Explorez tous les épisodes du podcast Facet Nation: A Gemmology Podcast
| Titre | Date | Durée | |
|---|---|---|---|
| 11. Gem weight and Specific Gravity: How heavy are your gemstones? | 10 Nov 2025 | 00:50:35 | |
In this episode of the Facet nation podcast, Simon and Lucinda delve into the intricate world of gemmology, focusing on the concepts of weight, density, and specific gravity. They explore the historical significance of Archimedes' principle, practical methods for hydrostatic weighing, and the use of heavy liquids in gem identification. The hosts engage with their audience, sharing insights and personal anecdotes, while emphasising the importance of these concepts in the gem trade. Titles The Weight of Gems: Understanding Density and Gravity Gemmology 101: Weight, Density, and Specific Gravity Sound bites "Weight is crucial in gem pricing." "The importance of weight in gem pricing." "Carat weight affects the price per carat." Chapters 00:00 Introduction and Welcome 02:53 Engagement with Listeners 05:14 Understanding Weight and Density in Gemstones 10:33 The Importance of Carat Weight 14:49 Price Per Carat and Market Dynamics 20:18 Specific Gravity Explained 25:11 Historical Context of Specific Gravity Measurement 27:24 Eureka! The Principle of Displacement 28:39 Hydrostatic Weighing: The Science of Density 33:45 Heavy Liquids: Testing Gemstones at Home 38:17 The Game of Sink, Swim or Suspend Weight is crucial in gem pricing and identification. Specific gravity is a key property for gemologists. Archimedes' principle is foundational in understanding density. Hydrostatic weighing is a practical method for determining specific gravity. Heavy liquids can help distinguish between different gemstones. Amber's specific gravity allows it to float in saltwater solutions. Carat weight affects the price per carat of gemstones. Understanding heft can aid in gem identification. Gemmologists often use digital scales for precise measurements. Engagement with listeners enhances the podcast experience. gemmology, weight, density, specific gravity, gemstones, Archimedes, hydrostatic weighing, heavy liquids, carat weight, gem identification, gemology | |||
| 10. Gem Durability: How hard are your gemstones? | 03 Nov 2025 | 01:07:54 | |
In this episode of FacetNation, Lucinda and Simon delve into the essential aspects of gem durability, focusing on hardness, toughness, and stability. They discuss the Mohs scale of hardness, the importance of understanding these properties for both gemologists and jewellery enthusiasts, and practical tips for caring for gemstones. The conversation also covers the differences between fracture and cleavage, the impact of chemical stability on gems, and how to properly maintain and wear jewellery. The episode concludes with listener engagement and a shout-out to dedicated fans. Takeaways Understanding durability is crucial for gemmologists and jewellery lovers. Hardness, toughness, and stability are the three main aspects of durability. The Mohs scale helps determine a gemstone's hardness. Toughness refers to a material's ability to resist fracture. Stability involves a gem's resistance to chemical and physical changes. Different gemstones have varying levels of durability and care requirements. Fracture and cleavage are important concepts in gemmology. Chemical stability can affect the appearance and longevity of gemstones. Proper care can prevent damage to valuable gems. Engaging with listeners enhances the podcast experience. Titles The Essential Guide to Gem Durability Understanding Gemstone Hardness and Toughness Sound bites ""You need to know them stone for stone."" ""Last on and first off for pearls."" ""Don't put your tourmalines in the ultrasonic, y'all."" Chapters 00:00 Understanding Durability in Gemstones 02:57 The Importance of Hardness 05:33 Mohs Scale of Hardness Explained 08:08 Identifying Gemstones by Hardness 10:44 Toughness and Durability in Gemstones 13:19 The Role of Friedrich Mohs 15:48 Practical Applications of Hardness Testing 20:46 Understanding Hardness and Scratch Testing 24:44 Identifying Composite Materials and Their Characteristics 26:28 Differential Hardness Explained 30:35 The Art of Cleaving Diamonds 34:21 Modern Techniques in Diamond Cutting 35:53 Differential Hardness in Other Gemstones 41:08 The Streak Test: A Practical Approach 45:36 Toughness vs Hardness in Gemstones 46:18 Thermal Expansion and Gemstone Integrity 47:46 The Dark Side of Crackled Quartz 49:09 Understanding Fractures in Gemstones 50:53 Cleavage vs. Fracture: Key Differences 52:50 The Importance of Cleavage in Gem Identification 54:35 Incipient Cleavage: A Hidden Danger 56:21 Stability: The Third Pillar of Durability 01:01:11 Chemical Vulnerabilities of Gemstones 01:04:29 Porosity and Its Impact on Stability 01:06:24 Final Thoughts on Gem Durability gemmology, durability, hardness, toughness, stability, Mohs scale, gemstones, jewellery care, fracture, cleavage, gemology | |||
| 1. WTF is Gemmology? | 01 Sep 2025 | 00:35:41 | |
So you wanna be a gemmologist? Or you just wanna know if granny's jewellery box is worth taking down the pawn shop? You're in the right place. In the first Facet Nation episode, you'll meet fellow gemstone obsessives Lucinda and Simon. Get the inside scoop on Gem-A and the jewellery industry at large and attempt to answer the eternal question; WTAF is gemmology? Summary In the inaugural episode of Facet Nation, hosts Lucinda Beeman and Simon Barber delve into the world of gemmology, sharing their personal journeys and experiences in the field. They discuss the importance of understanding gemstones for confident buying and selling, the defining characteristics of gems, and the educational paths to becoming a gemmologist. The conversation also touches on the community of gem lovers, the significance of cut in gemstones, and their favourite gems, all while aiming to entertain and educate listeners about the fascinating world of gems. Takeaways
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| 9. Spooktacular 2025: The World's Most Cursed Gemstones | 27 Oct 2025 | 00:56:20 | |
In this episode of Facet Nation, Lucinda and Simon explore the spooky side of gemstones, discussing Halloween traditions, recent robberies in the gem industry, and the history of cursed stones. They delve into tales of the Black Orlov diamond, the Bahia Emerald, The Black Prince's Ruby, and the infamous Hope Diamond, revealing the dark stories and misfortunes associated with these gems. Takeaways Halloween is a significant cultural event in America. The UK is slowly adopting American traditions like Halloween. Recent robberies in the gem industry highlight security issues. The Louvre robbery was a simple yet bold heist. Cursed gemstones have fascinating histories and folklore. The Black Orlov diamond is linked to multiple tragic deaths. The Bahia emerald has a history of misfortune for its owners. The Black Prince's ruby is associated with the downfall of monarchs. The Hope diamond has a legacy of tragedy and misfortune. Curses often stem from the act of stealing sacred objects. Titles Cursed Gems: The Dark Side of Beauty Halloween and the Haunting of Gemstones Sound Bites "Simon was the ringleader." "It's a bit weird." "The no hope diamond." Chapters 00:00 Halloween and Its Cultural Significance 02:56 Recent Robberies in the Gem Trade 05:42 The Louvre Robbery: A Closer Look 08:24 Hatton Garden Heist: A Shocking Incident 11:05 The Emotional Weight of Jewellery 13:18 Cursed Gemstones: An Introduction 15:45 The Black Orlov: A Cursed Diamond 20:30 The Curse of the Black Orlov Diamond 24:27 The Bahia Emerald: A Tale of Misfortune 30:04 The Black Prince's Ruby: A Royal Curse 38:31 The Legacy of Cursed Gems 38:53 Historical Figures and Their Legacies 41:03 The Curse of the Hope Diamond 54:18 Cursed Gems and Their Stories Keywords Halloween, gemstones, robberies, cursed stones, folklore, jewellery, history, spooky stories, gemmology, folklore, jewelry, gemology, diamond | |||
| 8. Beryl: Emerald's mum and Bas's wife | 20 Oct 2025 | 01:06:23 | |
In this episode, Lucinda and Simon dive deep into the fascinating world of Beryl gemstones, exploring its various types, including Emerald, Aquamarine, and Bixbite. They discuss the geological formation of Beryl, its unique characteristics, and the treatments often applied to enhance its appearance. The conversation also touches on the rarity of certain Beryl varieties and the importance of understanding inclusions and localities in gemmology. With a mix of humour and insightful information, the hosts provide a comprehensive overview of this captivating gemstone family. Takeaways Sound Bites Chapters Keywords | |||
| 7. Gem Crystallography: Habits and Forms | 13 Oct 2025 | 01:00:36 | |
In this episode of Facet Nation, Simon and Lucinda delve into the fascinating world of gemmology, focusing on crystals and their structures. They discuss the importance of understanding crystal systems, symmetry, and the various forms and habits of crystals. The conversation also covers topics such as twinning, pseudomorphs, polymorphs, and isomorphism, providing listeners with a comprehensive overview of these essential concepts in gemmology. The episode concludes with a preview of the next episode, which will focus on the Beryl family of crystals. Takeaways Crystals have orderly arrangements of atoms that define their structure. Understanding crystal systems is crucial for gemmology. Symmetry plays a significant role in identifying crystal types. Crystals can be classified into closed and open forms based on their terminations. Twinning occurs when two crystals share a common orientation. Pseudomorphs are formed when one mineral replaces another. Polymorphs have the same chemical composition but different structures. Isomorphism refers to different minerals having the same crystal structure. Crystals can exhibit various surface markings that aid in identification. The next episode will focus on the Beryl family of crystals. Sound Bites "Crystals have orderly arrangements of atoms." "Understanding crystal systems is crucial for gemmology." "Get those sticks out, y'all!" Chapters 00:00 Introduction to Facet Nation 02:53 Exciting Developments and Listener Engagement 05:40 Understanding Crystals and Their Structures 10:53 Crystal Systems and Their Characteristics 18:48 Symmetry in Crystals 26:32 Crystal Forms and Their Descriptions 34:17 Understanding Crystal Structures 37:41 Exploring Non-Geometrical Crystal Habits 39:57 Surface Markings and Their Significance 44:10 The Fascinating World of Crystal Twinning 50:33 Pseudomorphs and Polymorphs Explained 53:01 Isomorphism and Its Implications 55:02 Crystallography: The Systems and Their Members | |||
| 6. Gem Chemistry: Materials, Structure and Chemical Elements | 06 Oct 2025 | 00:50:34 | |
In this episode of Facet Nation, Lucinda and Simon delve into the foundational aspects of gemmology, focusing on the materials and structures that make up gemstones. They explore chemical elements, atoms, and subatomic particles, emphasising the importance of the periodic table and valency in understanding chemical bonds. The discussion covers crystalline and amorphous structures, the significance of quartz, and the formation of minerals. They categorize gemstones into oxides, silicates, carbonates, phosphates, and organic materials, providing insights into their properties and roles in gemmology. Strap in people, this is a heavy one. Titles Exploring the Depths of Gemmology The Building Blocks of Gemstones Sound bites "Atoms are extremely small." "Carbon has a valency of four." "Carbonates are the hippies of the group." Chapters 00:00 Introduction to Gemmology and Episode Overview 03:08 Understanding Elements and Atoms 06:09 Subatomic Particles and Their Roles 09:03 The Periodic Table and Atomic Structure 11:52 Valency and Chemical Bonds 14:36 Oxidation and Its Importance 17:38 Types of Chemical Bonds 20:27 Crystal Structures and Their Significance 23:32 Minerals and Their Formation 26:15 Key Elements in Gemstone Composition 28:09 The Ubiquity of Quartz and Its Elements 31:54 Understanding Gemstone Composition 34:27 The Importance of Silicates 40:07 Exploring Carbonates and Their Characteristics 42:03 The Role of Organic Materials in Gemstones 46:17 Rocks and Their Complexities gemmology, chemical elements, atoms, subatomic particles, periodic table, valency, chemical bonds, crystalline structure, minerals, gemstone composition, oxides, silicates, carbonates, phosphates, organic materials | |||
| 5. Corundum Part Two: Rubies, 'real' and otherwise | 29 Sep 2025 | 00:55:58 | |
Keywords In this episode, Simon and Lucinda delve into the captivating world of rubies, exploring their significance as July's birthstone, the science behind their colour and quality, and the various localities where they are found. They discuss the testing and identification of rubies, the treatments that enhance their appearance, and the rise of synthetic rubies in the market. The conversation also touches on famous rubies and their stories, providing listeners with a comprehensive understanding of these precious gemstones. | |||
| 4. Corundum Part One: All Hail Queen Sapphire | 22 Sep 2025 | 00:57:07 | |
In this episode, Lucinda and Simon delve into the fascinating world of corundum, exploring sapphires and rubies. They discuss the chemical composition, durability, and popularity of these gemstones, as well as their significance in engagement rings. The conversation also touches on the crystal structure of sapphires, the various colours and trends in the market, and the stories behind famous sapphires like the Logan Sapphire. The hosts emphasise the importance of understanding gemstones and encourage listeners to appreciate their unique qualities. Takeaways:
keywords: corundum, sapphires, rubies, gemstones, gemmology, engagement rings, durability, crystal structure, varieties, famous sapphires | |||
| 3. Observation, magnification and the amazing world of gem inclusions | 15 Sep 2025 | 01:01:18 | |
In this episode of Facet Nation, Lucinda Beeman and Simon Barber delve into the world of gemmology, focusing on the essential skill of observation. They share their personal experiences with gemmology exams, discuss the practical techniques for examining gemstones, and explore the significance of colour, lustre, transparency, and cut in determining a gem's value. The conversation also highlights the importance of inclusions and optical effects in identifying and appreciating gemstones, providing listeners with a comprehensive understanding of the gemmological process. Takeaways Observation is a key skill for gemmologists. Colour is a major factor in gemstone valuation. Lustre affects the visual appeal of gemstones. Transparency can indicate the quality of a stone. The shape and cut of a gemstone influence its beauty and value. Inclusions can tell a story about a gemstone's origin. Optical effects like Chatoyancy and Adularescence enhance a gem's allure. Using a loupe and proper lighting is essential for gem testing. Understanding diagnostic inclusions aids in gemstone identification. Gemmology combines science with artistry in evaluating stones. Titles The Art of Observation in Gemmology Unlocking the Secrets of Gemstones Sound bites "We are going to be talking all about observation today." "I had a cry too, I was on the corner of Black Horse Road." "Transparency is basically the question, can you see through it?" Chapters 00:00 Introduction and Exam Results 02:56 The Practical Gemmologist: Using a Loupe 06:01 Light Techniques in Gem Testing 08:21 Understanding Transmitted Light 11:02 The Importance of Colour in Gemmology 15:55 Exploring Lustre in Gemstones 21:01 Exploring Gemstone Lusters 24:21 Understanding Transparency in Gemstones 26:50 The Art of Cutting and Shaping Gemstones 38:26 Diving into Inclusions and Internal Features 42:33 Diagnostic Inclusions in Gemstones 49:02 The Importance of Non-Diagnostic Inclusions 49:03 Optical Effects and Their Significance 57:24 Future Topics and Closing Thoughts gemmology, gemstones, observation, lustre, inclusions, gem testing, color, transparency, shape, cut | |||
| 2. The Gem Kit | 08 Sep 2025 | 00:48:44 | |
Summary: In this episode of Facet Nation, Simon and Lucinda delve into the practical side of gemmology, focusing on the essential tools every gemologist should have in their toolkit. They discuss the importance of various instruments, how to use them effectively, and the differences between testing in a real-world setting versus an exam environment. The conversation covers everything from basic tools like tweezers and loupes to advanced instruments like refractometers and spectroscopes, providing insights into the art and science of gem identification. Takeaways
gemmology, gemmologist tools, practical gemmology, gem testing, gem identification, gem instruments, gemmology education, gemmology podcast, gem tools, gem analysis, gemology, gemologist | |||
| 12. Light and Wave Theory - A History | 17 Nov 2025 | 00:47:24 | |
In this episode of the Facet Nation: A gemmology podcast, hosts Lucinda and Simon explore the intricate relationship between light and gemstones. They discuss the importance of light in visibility and gem testing, delve into the characteristics of light waves, and examine historical theories of light, including Newton's corpuscular theory and Huygens' wave theory. The conversation also covers the significance of polarised light, the behaviours of light such as reflection, refraction, and diffraction, and the implications of the double slit experiment. The episode concludes with a look ahead to future topics related to light and gemmology. Titles Exploring the Nature of Light in Gemmology The Journey of Light: From Waves to Gems Sound bites "What is light?" "Light is essential for visibility." "Polarised light reduces glare." Chapters 00:00 Introduction and Graduation Celebration 03:03 Mnemonic for Mohs Scale 05:48 Understanding Light and Optics 11:28 Characteristics of Waves 16:59 Polarised Light and Its Applications 22:21 Wave Behaviours: Reflection, Refraction, and Diffraction 24:16 History of Light Theory and Newton's Contributions 26:29 Theories of Light: Newton vs. Huygens 30:07 The Double Slit Experiment: Proving Wave Theory 33:57 Einstein and the Birth of Modern Physics 36:10 The Photoelectric Effect: Light as Particles 38:31 Understanding Light: Refraction and Colour 42:09 Reflection, Transmission, and Absorption of Light 43:50 Recap and Future Discussions on Light and Gemmology Takeaways Light is essential for visibility and understanding gemstones. The Mohs scale mnemonic can be improved for better memorization. Light behaves as both a wave and a particle, known as wave-particle duality. Polarised light is crucial for reducing glare and enhancing visibility. Understanding wave characteristics like amplitude and frequency is vital for gemmology. Reflection, refraction, and diffraction are key behaviours of light waves. Historical theories of light evolved from Newton's corpuscular theory to wave theories. The double slit experiment demonstrated light's wave nature through interference patterns. Light interacts with matter, affecting colour perception and gemstone identification. Future discussions will delve deeper into light's role in gem testing. gemmology, light, optics, waves, Mohs scale, polarised light, reflection, refraction, diffraction, history of light, gemology, science | |||
| 13. Interview: Video Game Gemstones and Precision Gem cutting with Arya Akhavan | 24 Nov 2025 | 00:47:15 | |
In this episode Lucinda and Simon speak to gem cutting pioneer Arya Akhavan, his trademarked gemstone cuts; the Void Reaver and the Legend of Zelda inspired Rupee cut are some of the most beautiful you'll ever see. Listen to this fascinating interview full of almost revealed secrets and future excitement. If you love gems, videogames or videogame gems, this is the interview for you. Arya Akhavan is a pioneer in video game-themed gem cutting. The gem cutting community is becoming more collaborative and innovative. Video games have a historical connection to gemstones as valuable items. Creating video game-inspired gems involves both artistic and technical skills. The rupee cut is a unique design that poses specific challenges. Community forums like Shiny Precious Gems foster support and creativity. Modern gem cutting techniques are evolving rapidly, especially post-COVID. There is a growing demand for high-end video game-themed jewelry. Education in gem cutting is becoming more accessible and innovative. The emotional connection to gemstones influences how they are valued and cherished. Link: Kickstarter https://www.kickstarter.com/projects/canadacrystallabs/the-gemstone-lab-growing-never-before-seen-lab-sapphires https://www.reddit.com/r/Shinypreciousgems/ Titles Gemology Meets Gaming: The Rupee Cut Revolution Crafting Gems: Arya Akhavan's Journey Sound bites "It's a really fascinating chat." "Nobody else had published them." "It's a rescue puppy." Chapters 00:00 The Emergence of Video Game Jewelry 04:56 Educational Challenges in Gem Cutting 07:36 The Growth of Modern Gem Cutters 10:19 Community Building in Gemology 13:20 The Intersection of Gemstones and Video Games 15:52 Creating the Rupee Cut 18:38 Characteristics of the Rupee Cut 21:40 Materials for Gem Cutting 24:11 Challenges with Certain Gem Materials 25:12 Setting and Wearing Gemstones 26:59 Emotional Connections to Cut Stones 28:27 Innovative Gemstone Designs 29:48 The Evolution of Gem Cutting Techniques 33:09 The Renaissance of Modern Gem Cutting 36:26 Future Innovations in Gemstone Research 43:01 Exploring Corundum and Sapphires 45:18 Community Engagement in Gemology 46:47 The Value of Rupees and Gaming References gemmology, video game gems, gem cutting, Arya Akhavan, gemstone design, community building, gem education, rupee cut, innovative designs, gem materials, gemology | |||
| 14. Light and Optics in Gemstones | 01 Dec 2025 | 00:52:07 | |
In this episode of the Facet nation podcast, Simon and Lucinda delve into the intricate world of light and optics as they relate to gemmology. They explore the fundamental properties of light, including reflection and refraction, and discuss how these principles apply to gemstones. The conversation covers the importance of cut in diamonds, the various optical effects seen in gemstones, and the significance of birefringence. The hosts also touch on the practical applications of these concepts in gem testing, providing listeners with a comprehensive understanding of how light interacts with gemstones. gemology, light, optics, reflection, refraction, birefringence, diamonds, optical effects, gemstones, gem testing, gemmology | |||
| 15. Live Episode - Tanzanite - The Gem and Mineral Show London | 08 Dec 2025 | 00:28:19 | |
In this live episode of Facet nation, hosts Simon and Lucinda share their experiences at the London Gem and Mineral Show, where they discuss the fascinating gemstone Tanzanite, its properties, discovery, and significance as a birthstone for December. They delve into the science behind Tanzanite's colour, its varieties, and its cultural importance, while also sharing personal anecdotes and insights from their gemmology journey. The London Gem and Mineral Show was a significant experience for the hosts. Tanzanite is the birthstone for December, making it a popular gift choice. Zoisite is the mineral family that Tanzanite belongs to. Tanzanite's colour is influenced by the presence of vanadium and iron. The discovery of Tanzanite is attributed to various individuals, leading to some controversy. Tanzanite requires heat treatment to achieve its vibrant blue colour. The gemstone is known for its vitreous lustre and unique trichroism. Tanzanite is relatively soft, making it less suitable for certain types of jewellery. The largest faceted Tanzanite weighs 703 carats, showcasing its potential size. Tanzanite is associated with transformation and spirituality in various cultures. Titles The Fascinating World of Tanzanite Tanzanite: A December Birthstone Exploration Sound bites "It's our first ever live show!" "Tanzanite has a vitreous luster." "Tanzanite is a very rare stone." Chapters 00:00 Introduction to the Live Show Experience 03:16 Exploring Tanzanite: The Birthstone of December 06:19 Understanding Zoisite and Its Varieties 09:08 The Science Behind Tanzanite's Colour and Properties 12:25 The Discovery and Commercialisation of Tanzanite 15:11 Tanzanite's Unique Characteristics and Uses 18:09 Metaphysical Properties and Cultural Significance of Tanzanite 21:12 Conclusion and Future of Facet nation Podcast Tanzanite, Gemmology, Birthstone, Zoisite, Live Podcast, Gemstones, Mineral Show, Colour Properties, Discovery, Metaphysical Properties, Gemology, Tiffany, Trichroism | |||
| 16. Light & Gem Testing Instruments: The Polariscope | 15 Dec 2025 | 00:45:56 | |
In this episode of Facet Nation, Simon and Lucinda explore the intricacies of gemmology, focusing on the polariscope and its significance in testing gemstones. They discuss the behaviour of light in relation to isotropic and anisotropic materials, the importance of understanding internal stress in gems, and the use of the conoscope for identifying gemstones. The conversation emphasises community engagement and the joy of learning in the field of gemmology. Titles The Fascinating World of Gemmology Understanding Gem Testing Instruments Sound bites "We want to see more cats." "Light needs to be able to get through." "The bullseye is diagnostic of quartz." Chapters 00:00 Introduction to Gemmology and Light Testing 02:55 Deep Dive into the Polariscope 05:26 Understanding Polarisation and Light Behaviour 08:01 Isotropic vs. Anisotropic Materials 10:41 Testing Gemstones with the Polariscope 13:05 Vibration Directions in Gemstones 15:49 Birefringence and Optical Axes 18:41 Conclusion and Key Takeaways 23:52 Understanding Polycrystalline Materials 27:19 Exploring Strain and Anomalous Double Refraction 30:39 Identifying Tabby Extinction and Writhing Snakes 34:11 The Role of the Conoscope in Gem Testing 37:26 Interference Figures: The Bullseye and Beyond 39:47 Biaxial Interference Figures and Their Significance Understanding the importance of the polariscope in gemmology. Light behaviour is crucial for interpreting gemstone properties. Isotropic materials remain dark under polarised light. Anisotropic materials show varying light responses. Polycrystalline materials allow light through in multiple directions. Anomalous double refraction indicates internal stress in gemstones. Conoscopes help identify gemstone types through interference figures. Interference figures provide diagnostic information about gemstones. Recognising tabby extinction and writhing snakes in gem testing. The podcast emphasises community engagement and learning. gemmology, polariscope, isotropic, anisotropic, gemstones, light behaviour, gem testing, interference figures, conoscope, anomalous double refraction, gemology | |||
| 17. Interview: Rosie Young. Lab Gemmology and all things Sunstone | 22 Dec 2025 | 00:49:57 | |
In this episode of Facet Nation, hosts Simon and Lucinda chat with Rosie Young, a lab gemologist at GCS Lab. Rosie shares her journey from a tax advisor to a passionate gemmologist, discussing her education, experiences, and the day-to-day operations in a gem lab. The conversation delves into the fascinating world of sunstones, including their unique properties, treatments, and the science behind their colours. Rosie also highlights her research on sunstones and the importance of spreading awareness about this beautiful gemstone. The episode concludes with insights into the gem market and the joy of discovering new gemstones. Takeaways Rosie transitioned from tax advising to gemmology, pursuing her passion. She graduated with a BSc in Gemmology and started working at GCS Lab. Lab gemmology involves analysing gemstones using advanced equipment. Sunstones are a unique and under-appreciated gemstone. Copper-bearing sunstones come primarily from Oregon. Diffusion treatment can alter the appearance of gemstones. Color zoning in sunstones is a fascinating phenomenon. Rosie enjoys sharing her knowledge about gemstones with others. The gem market is constantly evolving with new trends. Sunstones have a variety of localities and unique characteristics. Titles Exploring the World of Gemmology with Rosie Young The Journey from Tax Advisor to Gemmologist Sound Bites "I always loved gems as a kid." "It's worked out really well for me." "I would just be happy for it." Chapters 00:00 Introduction to Gemmology and Guest Introduction 04:39 Rosie's Journey into Gemmology 07:06 Educational Experiences in Gemmology 09:43 Internship at GIA and Research Focus 12:19 Working at GCS Lab: Daily Operations 15:11 Lab Equipment and Techniques 17:33 Trends in Gemstone Submissions 20:18 Favourite Gemstones and Unique Finds 22:46 Research on Sunstones and Their Varieties 26:14 The Quest for Sunstone Knowledge 27:18 Origins of Sunstones 28:25 Locality Preferences and Unique Characteristics 28:59 Copper-Bearing Sunstones: A Comparative Analysis 30:48 Colour Zoning in Oregon Sunstone 33:29 Copper Diffusion Experiments 36:29 The Science Behind Diffusion Treatments 38:15 Identifying Diffusion-Treated Stones 42:23 Personal Connections to Sunstone 44:59 Exploring the World of Sunstones 47:34 Inspiration from Gemstones 48:25 Holiday Greetings and Future Plans Keywords gemmology, sunstone, lab gemmology, gemstone treatments, GCS Lab, Rosie Young, gem education, gemstone analysis, gem certification, gem market trends | |||
| 19. Gemmology Exam Preparation: What to expect | 12 Jan 2026 | 00:56:41 | |
In this episode of Facet Nation, Lucinda and Simon discuss their experiences preparing for and taking the Gem-A exams, particularly focusing on the diploma exam. They share personal anecdotes about their study strategies, the unique challenges of the Gem-A exams, and tips for managing exam anxiety. The conversation covers various aspects of preparation, including the importance of understanding the material deeply, utilizing practice papers, and the significance of real-world application in gemmology. They also reflect on their experiences during the exam days, offering insights into the practical and theory components of the exams, and conclude with advice for future candidates. Exams can be stressful, but preparation helps alleviate anxiety. Gem-A exams are known for their difficulty and require deep understanding. Different study methods work for different people; find what suits you best. Real-world application of gemmology knowledge enhances understanding. Start preparing early to build a solid foundation of knowledge. Utilise flashcards and practice papers for effective revision. Stay calm and organised during the exam to maximise performance. The invigilators are supportive and there to help you succeed. It's normal not to doubt yourself during the exam; trust your knowledge. Post-exam discussions can help clarify doubts and reduce anxiety. Navigating the Gem-A Exam Experience Mastering Gemmology: Exam Strategies and Insights Sound bites "I was really worried about the practical." "You can get two wrong and still pass." "I still have dreams about it." Chapters 00:00 Introduction to Exam Season Anxiety 02:38 Understanding GEM-A Exams 05:31 Preparing for the Diploma Exam 07:53 Study Strategies and Techniques 10:47 Real-World Application of Gemmology 13:27 Tips for Early Preparation 15:51 One Month Out: Focused Revision 18:48 The Importance of Practice Papers 21:29 Final Week Preparations 24:16 Day of the Exam: Priorities and Mindset 32:07 Navigating Exam Day Challenges 37:19 Exam Preparation Strategies 41:31 Experiencing the Exam: Insights and Reflections 51:56 Coping with Post-Exam Anxiety 55:39 Final Thoughts and Advice for Future Candidates | |||
| 18. The Best Kept Secrets of Spinel | 05 Jan 2026 | 00:43:22 | |
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| 20. The Refractometer: Gem testing and how it works | 19 Jan 2026 | 00:44:54 | |
In this episode of Facet Nation, Simon and Lucinda delve into the intricacies of the refractometer, a crucial tool for gemmologists. They discuss its importance in identifying gemstones by measuring the refractive index, emphasising how light behaves when it enters different materials. The hosts share personal anecdotes and practical tips for using the refractometer effectively, including the significance of using the right light source and the challenges posed by contact fluid. They also highlight common pitfalls and best practices to ensure accurate readings, making the episode both informative and engaging for listeners interested in gemmology. Throughout the conversation, Simon and Lucinda provide insights into the technical aspects of the refractometer, such as total internal reflection and the importance of clean surfaces. They also touch on the emotional aspects of studying gemmology, sharing their experiences with exam preparation and the sense of community among gemmology students. The episode concludes with a light-hearted discussion about the challenges of using the refractometer and the importance of practice in mastering this essential tool. Keywords gemmology, refractometer, gemstone identification, light refraction, gemmology tools, refractive index, gemmologist tips, gemmology podcast, optical properties, gemstones, gem testing, light and optics, education, science Takeaways The refractometer is essential for identifying gemstones. Using the correct light source is crucial for accurate readings. Practice makes perfect when using the refractometer. Keep the glass table of the refractometer clean to avoid inaccurate results. Understanding total internal reflection is key to using the refractometer. Titles Mastering the Refractometer: Essential Tips for Gemmologists Unlocking the Secrets of Gemstone Identification with the Refractometer Sound bites "Not having a refractometer is like going into battle with a spoon." "Sodium yellow light is the agreed upon standard." "When in doubt, get your refractometer out." Chapters 00:00 Introduction to the Refractometer 01:52 Understanding Refraction and Its Importance 04:53 How the Refractometer Works 10:22 The Role of RI Fluid in Testing 14:10 Interpreting Shadow Edges and RI Readings 19:08 Birefringence and Its Significance 22:56 Identifying Uniaxial vs. Biaxial Stones 25:24 Understanding Biaxial Materials 28:13 Distant Vision Reading Techniques 32:52 Practical Tips for Using a Refractometer 36:29 House Rules for Refractometry 41:30 Final Thoughts on Refractometer Use | |||
| 21. Interview: Jeff Hapeman, Earth's Treasury. Montana Sapphires and more | 26 Jan 2026 | 01:02:10 | |
In this episode of Facet Nation, hosts Lucinda and Simon interview Jeff Hapeman, owner of Earth's Treasury, who shares his unique journey from academia to the gem industry. Jeff discusses the fascinating world of Montana sapphires, the challenges and opportunities within the gem market, and the importance of ethical sourcing and cutting techniques. The conversation highlights the growing popularity of coloured stones and the evolving consumer preferences in jewellery design. In this engaging conversation, Jeff Hapeman discusses the intricacies of gem cutting, the inspirations behind his jewellery designs, and the fascinating world of photomicrography. He shares insights into the judging process for the Gem-A Photographer of the Year and reflects on his experiences with Montana sapphires, emphasising the beauty and uniqueness of gemstones. Takeaways Jeff transitioned from academia to gemmology after realising academia wasn't for him. Earth's Treasury focuses on American gemstones, particularly Montana sapphires. Montana sapphires offer a unique variety of colours and qualities. The gem industry faces challenges with sourcing and environmental regulations. Jeff emphasises the importance of ethical sourcing in the gem market. The rise of coloured stones reflects changing consumer preferences. Gem cutting techniques can significantly affect the appearance of stones. There is a growing awareness of the importance of quality cutting in coloured stones. Jeff believes that coloured stones are becoming more popular among younger generations. The future of gemmuology will likely see continued growth in the colored stone market. The pavilion angle needs to be steeper for optimal performance. Jewellery is bespoke and designed specifically for each stone. Sphene is a captivating gem with unique dispersion. The Garnet Supernova necklace was inspired by a collector's love for Art Deco. Colour is a key element in trendy jewellery designs. Photomicrography reveals the intricate beauty of gemstones. Judging photography involves assessing technical skill and aesthetic appeal. Montana sapphires are mined in limited quantities, often yielding smaller stones. Patience and persistence are essential in gemstone photography. The journey of a gemstone from rough to finished piece is a labor of love. Titles The Art of Gem Cutting: Insights from Jeff Hapeman Design Inspirations: Crafting Unique Jewellery Sound bites "I try to minimise the waste." "They look awesome." "I love all gems equally." Chapters 00:00 Introduction to Gemmology and Guest Introduction 03:24 Jeff Hapeman's Unique Journey into Gemmology 08:41 The Birth of Earth's Treasury and Business Evolution 12:14 Montana Sapphires: A Gemstone Revolution 19:55 The Appeal of Coloured Stones in Modern Jewellery 23:29 The Future of Diamonds and Coloured Gemstones 27:41 Exploring Unique Garnets and Tourmalines 29:02 Innovative Cuts for Montana Sapphires 31:35 The Art of Precision Cutting 33:30 Designing Jewellery with Timeless Inspiration 37:50 Creating Signature Jewellery Designs 42:38 The World of Photomicrography 47:41 Judging the GemA Photographer of the Year 49:26 The Art of Inclusion Photography 52:06 Patience in Photography and Nature 53:24 Experiences in the UK and Gemmology 56:14 Self-Publishing and the Journey of a Book 58:11 The Reality of Sapphire Mining gemmology, Montana sapphires, Jeff Hapeman, Earth's Treasury, gem cutting, coloured stones, jewellery design, gem industry, gem tren | |||
| 22. Interview: Justin Prim - gemcutter, author, teacher and historian | 02 Feb 2026 | 01:07:05 | |
In this episode of Facet Nation, hosts Lucinda and Simon welcome gem cutter Justin K Prim, who shares his fascinating journey from music to gemmology. Justin discusses his experiences in the gem trade, the art and science of gem cutting, and the importance of community in the field. He also delves into his favorite gemstones, the challenges of the trade, and his exciting new projects, including a gem cutting school and a museum showcasing his extensive collection of machines and books. Find out more: Takeaways Justin transitioned from a career in music to gem cutting. He discovered the gem trade through a local gem show. Lapidary clubs play a crucial role in learning gem cutting. Emeralds are Justin's favourite gemstones to cut. The gem cutting process requires patience and attention to detail. Community support is vital for aspiring gem cutters. Justin emphasises the importance of creativity in gem cutting. He is excited about his new gem cutting school and museum. The gem trade is evolving, with a growing appreciation for well-cut stones. Justin's books aim to educate and inspire future gem cutters. Titles From Music to Gemmology: Justin K Prim's Journey The Art of Gem Cutting with Justin K Prim Sound bites "I want to keep cutting." "I love cutting emeralds." "It's a mystery." Chapters 00:00 Introduction to Gemmology and Guest Introduction 01:13 Justin's Journey into Gem Cutting 05:19 Discovering the Gem Trade 09:06 The Evolution of Gem Cutting Community 11:45 Getting Started in Lapidary 14:47 The Art of Gem Cutting 16:18 Moving to Bangkok for Gemmology School 20:20 Building a Career in Gem Cutting 23:07 Life in France and the Gem Business 25:47 The Process of Cutting a Gemstone 27:01 The Art of Preforming and Cutting Gems 29:54 Polishing and Final Touches in Gem Cutting 31:54 Exploring Different Faceting Techniques 33:43 The Journey of Learning and Experimentation 36:30 Building a Gem Cutting School and Museum 38:15 The Passion Behind Gem Cutting and Teaching 42:29 The Evolution of Gem Cutting Techniques 47:32 Historical Insights into Gem Cutting 52:36 The Importance of Quality in Gemstones 54:57 Understanding Coloured Stones vs. Diamonds 56:28 The Journey of a Gemstone Buyer 58:53 Emotional Connections in Jewellery Making 01:04:48 The Art of Cutting Gemstones 01:06:23 Future Plans and Collaborations gemmology, gem cutting, gemstones, lapidary, gem trade, gem cutter, gem education, gem collection, gem stories, gem enthusiasts, books, gem history, museum | |||
| 23. Colour: An introduction | 09 Feb 2026 | 00:25:20 | |
In this episode of the Facet nation gemmology podcast, Lucinda and Simon explore the intricate world of colour in gemstones. They discuss the significance of colour in determining the value of gemstones, the science of light and how it interacts with materials to create colour, and the chemical elements responsible for these hues. The conversation also covers the colour wheel and its relevance to gemstones, the methods of analysing gemstones through spectroscopy, and the perception of colour. The episode concludes with a teaser for future discussions on more complex topics related to colour in gemmology. Takeaways Colour is the most important aspect of coloured gemstones. The value of gemstones is influenced by colour, history, and trends. Light is essential for colour perception in gemstones. Selective absorption determines the colour we see in gemstones. Eight chemical elements are responsible for colour in gemstones. The colour wheel helps understand colour relationships in gemstones. Not all light sources are suitable for gemstone analysis. Spectroscopy is a key tool in analysing gemstone colours. Understanding the science of colour enhances appreciation for gemstones. Future episodes will explore more complex topics in gemmology. Titles Exploring the Colour Spectrum of Gemstones The Science Behind Gemstone Colours Sound bites "Everything comes back to light." "Not all white light is created equal." "If there is no light, does colour exist?" Chapters 00:00 Introduction to Colour in Gemmology 01:50 The Importance of Colour in Gemstones 04:34 Understanding Light and Colour 09:11 Chemical Elements and Colour 12:29 The Colour Wheel and Its Application 16:15 Spectroscopy and Light Sources 21:16 Conclusion and Future Topics gemstones, colour, light, spectroscopy, chemical elements, colour wheel, gemmology, ruby, sapphire, emerald | |||
| 24. Colour: The Spectroscope and Selective Absorption in Gems | 16 Feb 2026 | 00:52:55 | |
In this episode of Facet Nation, Simon and Lucinda delve into the fascinating world of gemmology, focusing on the spectroscope and its critical role in identifying gemstones. They discuss the different types of spectroscopes, techniques for using them, and the importance of diagnostic spectra in gem identification. The conversation is rich with insights into the nuances of color absorption and the practical applications of these tools in the field. The hosts also share personal anecdotes and tips for gem enthusiasts, making the episode both informative and engaging. Takeaways The spectroscope is essential for identifying gemstones. There are two main types of handheld spectroscopes: prism and diffraction grating. Using a spectroscope can help you understand how gemstones absorb light. Techniques for using a spectroscope include transmitted and reflected light methods. Diagnostic spectra are crucial for identifying specific gemstones. Understanding colour absorption helps in gem identification. The spectroscope can be used on both rough and polished stones. Learning the diagnostic spectra of gemstones is beneficial for gemmologists. The conversation emphasises the importance of practical experience in gemmology. Future episodes will cover more advanced topics in gemmology. "We're going to talk about the spectroscope." "It's a really good one." "You can't see it, but it's there." Chapters 00:00 Introduction to Gemmology and Recent Finds 02:06 Exploring the Spectroscope: A Gemmologist's Tool 11:16 Understanding Dispersion and Diffraction in Gemstones 18:39 Techniques for Using the Spectroscope 22:31 Diagnostic Spectra and Their Importance 26:53 The Art of Writing and Dashes 29:41 Understanding Spectrums: Zircon and Ruby 32:18 Emerald and Alexandrite Spectrums 35:03 Synthetic and Natural Sapphires 37:28 Exploring Iron Spectrums in Gemstones 40:03 The Spectrum of Garnets and Jadeite 42:42 Cobalt Spectrums: Spinel and Glass 45:31 Rare Earth Elements and Red Glass 47:59 Diamonds and Their Unique Spectra gemmology, spectroscope, gemstones, diagnostic spectra, colour absorption, gem identification, gemmology techniques, gem enthusiasts, gem collectors, gemstone analysis, gemology | |||
| 26. Interview: Andrew Geoghegan - Jewellery Design, Branding and Keeping it Real | 02 Mar 2026 | 00:52:43 | |
Join us as we explore the journey of jewellery designer Andrew Geoghegan, from childhood fascination with treasure to creating innovative collections inspired by history and nature. Discover insights on craftsmanship, branding, and staying authentic in a digital world. key topics Andy Geoghegan's early fascination with treasure and jewellery The journey from university to professional jewellery design The importance of authenticity and personal style in branding Inspiration from history, nature, and personal experiences Challenges and insights in modern jewellery marketing guest name Andrew Geoghegan Titles From Childhood Mischief to Jewellery Mastery: Andrew Geoghegan's Creative Journey Unlocking the Secrets of Gem Setting and Jewellery Design sound bites "That moment sparked my love for jewellery" "The use of colour in jewellery is about expression" "Finding that relic was like discovering treasure" Chapters 00:00 Introduction to Andrew Geoghegan 01:20 The Journey Begins: Early Memories of Jewellery 02:57 From Art College to Jewellery Design 09:10 Building the Brand: The Early Days 11:32 Navigating Challenges and Perseverance 16:22 The Digital Age: Marketing Jewellery Today 23:56 Design Inspirations and Client Connections 30:08 The Art of Craftsmanship in Jewellery 34:06 Innovative Use of Colour in Jewellery Design 36:59 Embracing Individuality in Gemstone Choices 37:21 Inspiration from Nature and History 42:33 The Thrill of Treasure Hunting 48:44 Launching the Treowth Collection resources Susannah King on Instagram - https://www.instagram.com/susannahkinglondon/ The Detectorists (TV Series) - https://www.netflix.com/title/80064446 Gemology Resources - https://www.gia.edu/ Jewelry Design Books - https://www.amazon.com/s?k=jewelry+design guest links Instagram - https://www.instagram.com/andrewgeoghegan/ https://andrewgeoghegan.com/ jewellery design, gemmology, jewellery collection, craftsmanship, branding, authenticity, goldsmithing, gemstone, jewellery inspiration, digital marketing | |||
| 25. Interview: Wim Vertriest - GIA Field Gemmology, Gem Identification and Mozambique Rubies | 23 Feb 2026 | 01:02:52 | |
Join us as Wim Vertriest, head of field gemmology at GIA, shares his journey from geology to gemmology, insights into Mozambique rubies, and the fascinating science behind gemstone origin determination. Discover how field gemmology connects geology, anthropology, and the gemstone trade to deepen your understanding of these precious stones. Key topics Wim Vertriest's journey from geology to gemmology Insights into Mozambique ruby deposits and mining practices The role of field gemmology in understanding gemstone origins Scientific techniques for gemstone identification and origin determination The impact of Mozambique rubies on the global gemstone market Guest name Wim Vertriest Titles The Science and Secrets of Mozambique Rubies: An Interview with Wim Vertriest From Geology to Gemmology: Wim Vertriest's Journey at GIA sound bites "Gemmology is about understanding the whole ecosystem." "Heat treatment leaves subtle but detectable clues." "My favourite gemstone is the Cat's Eye Chrysoberyl." Chapters 00:00 Introduction to Gemmology and Guest Background 02:57 Wim's Journey into Gemmology 05:19 The Role of Field Gemmology 07:55 Understanding Gemstone Origins 10:14 Geological Mysteries of Rubies 12:39 The Impact of Mining on Gemstones 15:12 The Evolution of Consumer Awareness 17:43 Building a Reliable Gemstone Collection 20:30 The Multidisciplinary Nature of Field Gemmology 23:04 Exploring the Origins of Sapphires 24:09 Field Gemmology: Balancing Lab Work and Expeditions 26:03 Research-Driven Gemmology: Filling Knowledge Gaps 27:39 Emerging Trends in Gemstone Popularity 29:24 The Challenges of Diamond Origin Determination 30:37 Identifying Gemstones: The Art of Exclusion 33:23 Declassifying Misidentified Stones 39:55 The Canary in the Coal Mine: Ruby Heating Experiments 44:18 The Chemistry of Gemstones 46:47 Advanced Techniques in Gemmology 48:08 The Rise of Mozambique Rubies 52:42 The Evolution of Ruby Mining 58:42 Changing Perceptions of Rubies 01:01:11 The Future of Gemmology resources GIA Official Website - https://www.gia.edu Gems and Gemology Journal - https://www.gia.edu/gems-gemology Mozambique Ruby Mining Insights (Report) - https://www.gia.edu/mozambique-ruby-report Wim Vertriest's Profile on LinkedIn - https://www.linkedin.com/in/wimvertriest Guest links LinkedIn - https://www.linkedin.com/in/wimvertriest GIA Profile - https://www.gia.edu/wim-vertriest gemmology, gemstones, Mozambique rubies, gemstone origin, field gemmology, GIA, gem research, gemstone mining, gemstone identification, gem science | |||
| 28. Colour: Pleochroism and Colour Filter Gem testing | 16 Mar 2026 | 00:32:08 | |
In this episode, Lucinda and Simon explore the fascinating world of gemmology instruments, focusing on colour filters like the Chelsea colour filter and pleochroism testing methods. Learn how these tools aid in gemstone identification and enhance gem cutting techniques. Educational key topics Colour filters in gemmology Chelsea colour filter purpose and use Pleochroism and its significance in gemstone identification Testing for pleochroism with London Dichroscope and calcite dichroscope Importance of light source and gemstone orientation in testing Natural vs synthetic gemstone identification techniques key frameworks Colour absorption principles Pleochroism and optical anisotropy Gemstone orientation and cutting strategies Titles Mastering Gemstone Identification: The Power of Colour Filters and Pleochroism Tests Unlocking Gem Secrets: Chelsea Filter and Pleochroism in Gemmology sound bites "Record your observation by stating the colour scene." "Always think about why you're looking at the stone." "Share your pleochroic observations with others." Chapters 00:00 Introduction to Colour Filters in Gemmology 01:55 Understanding Pleochroism and Selective Absorption 05:27 Testing for Pleochroism with the London Dichroscope 10:34 Comparing the London Dichroscope and Calcite Dichroscope 15:36 Documenting Pleochroism Observations 17:35 Understanding Gemstone Colours and Pleochroism 20:04 The Chelsea Colour Filter: A Gemstone Testing Tool 26:23 Practical Applications of the Chelsea Colour Filter 28:50 Identifying Gemstones: Colour Responses and Observations resources Gem-A - https://www.gem-a.com Pleochroism in Gemstones (Book) - https://www.amazon.com/pleochroism-gemstones Instagram - https://www.instagram.com/facetnationgemmology Email - facetnation@facetnation.co.uk gemmology, colour filters, Chelsea filter, pleochroism, gemstone identification, gem testing, gem cutting, gemmology tools | |||
| 27. Jadeite: A Cultural Icon | 09 Mar 2026 | 00:55:39 | |
This episode explores the fascinating world of jadeite, covering its geology, colours, treatments, cultural significance, and the latest gemological insights. Hosted by gemmologists Lucinda and Simon, it offers a deep dive into one of the most revered gemstones across cultures. key topics Jadeite vs Nephrite Colours and Varieties of Jadeite Treatments and Impostors in Jadeite Cultural Significance of Jade in China and Central America Geology and Formation of Jadeite Titles Jadeite Unveiled: 10 Facts Every Gemologist Should Know The Hidden World of Jadeite: From Burma to Central America sound bites "Imperial Jade is the poster child for jadeite" "Mining jadeite involves cutting into massive boulders" "Testing includes SG, hardness, and visual clues" Chapters 00:00 Introduction to Jadeite 02:54 The Complexity of Jadeite 05:43 Understanding Jadeite's Properties 08:39 The Formation and Sources of Jadeite 11:20 Cultural Significance and Jewellery of Jadeite 14:08 Impostors and Imitations of Jadeite 18:40 Testing and Identifying Jadeite 26:46 Exploring Literature and Its Influence 28:01 Understanding Specific Gravity in Gemmology 29:59 Testing Gem Hardness and Its Implications 31:30 Refractive Index: A Key to Gem Identification 33:28 The Complex World of Jade Treatments 39:14 Cultural Significance of Jade in China 51:31 Jade's Historical Importance in Central America Resources Gem-A (Gemological Association of Great Britain) - https://gem-a.com Real Jade Co. - https://realjade.com Instagram - https://instagram.com/facetnationgemmology jadeite, gemmology, gemstones, jade, mineralogy, treatments, cultural significance, Guatemala jade, gem identification | |||
| 29: Organics: Coral. Don't bleach it! Or Maybe you should. | 23 Mar 2026 | 00:36:36 | |
This episode explores the fascinating world of coral, its history, types, and significance in gemmology. Hosted by Simon and Lucinda, it covers everything from the biological origins of coral to its cultural importance and modern regulations. sound bites "Polyps are tiny creatures related to sea anemones." "Coral structures are like a living family tree." "Black and gold coral are rare and often bleached." key topics Definition of organic materials History of coral harvesting and trade Types of coral: precious, soft, fossilised, black and gold Identification and authenticity of coral in jewelry Regulations and sustainability in coral trade Chapters 00:00 Introduction to Coral and Organic Materials 02:53 The Importance of Organic Materials 05:14 Coral Fishing in History 07:57 Understanding Coral Polyps 10:32 The Journey of Coral Harvesting 13:03 Regulations and Sustainability in Coral Harvesting 15:33 Coral as a Jewelry Material 18:03 Types of Coral and Their Significance 21:50 Identifying Coral: Key Features and Characteristics 24:33 Understanding Soft Coral: Misleading Names and Textures 26:42 Fossilised Coral: The Transformation Process 28:20 Exploring Black and Gold Coral: Unique Properties and Origins 32:17 Coral Conservation: The Impact of Overfishing and Regulations 34:44 Closing Thoughts: The Beauty and Importance of Coral resources Gemmology by C. D. M. Roberts - https://www.amazon.com/Gemmology-C-D-M-Roberts/dp/XXXXXX CITES - Convention on International Trade in Endangered Species - https://cites.org/ Coral Museum in Naples, Italy - https://www.coralmuseumnaples.it/ https://instagram.com/facetnationgemmology guest links Instagram - https://instagram.com/facetnationgemmology TikTok - https://tiktok.com/@facet.nation.pod coral, gemmology, organic materials, jewellery, coral harvesting, coral types, coral regulation, fossilised coral, coral history, coral identification | |||
| 30. Colour: Physical Optics and Colour Phenomena | 30 Mar 2026 | 00:41:12 | |
Explore the fascinating world of physical optics in gemstones, focusing on iridescence, thin film interference, and the science behind colour phenomena like labradorescence and opalescence. Perfect for budding gemologists and enthusiasts alike. gemmology, physical optics, iridescence, labradorescence, opalescence, gemstone science, thin film interference, gemstone phenomena | |||
| 31. Interview: Ian Dun FGAA FGSGA, Federal President Gemmological Association of Australia | 13 Apr 2026 | 00:55:24 | |
This week we are joined by Ian Dun, president of the Gemological Association of Australia. Discover insights into gemstone grading, Australian gemstones, and the future of gemological research. Of Particular interest is GAA's, world first, Opal Studies Course. Come and listen to find out all you need to know. Opal Course - https://www.gem.org.au/courses/opal-studies/ CIBJO Opal Guide - https://www.cibjo.org/ keywords | |||
| 32. Causes of Gemstone Colour: Dispersed Metal Ions | 20 Apr 2026 | 00:28:09 | |
This episode explores the science behind gemstone colours, focusing on dispersed metal ions, valency states, atomic environments, and their effects on colour and luminescence. Hosted by Lucinda and Simon, it combines scientific insights with personal reflections and industry tips. gemmology, gemstone colour, dispersed metal ions, valency, atomic environment, luminescence, gemstone spectroscopy, Alexandrite, ruby, emerald | |||
| 33. Tourmaline Part One: Conquistadors and the party where everyone's invited | 27 Apr 2026 | 00:42:19 | |
Join us as we explore the fascinating world of tourmaline, its formation, varieties, and historical significance, with insights from gemmologists Lucinda and Simon. tourmaline, gemstones, gemmology, mineral formation, jewellery, gem varieties, gemstone history, gem testing, gem inclusions | |||
| 34. Gemstone Colour: Charge Transfer and Colour Centres | 04 May 2026 | 00:38:19 | |
Explore the fascinating science of gemstone colour, focusing on charge transfer mechanisms, the role of ions, and how treatments like heat affect gemstone hues. Perfect for gemmology enthusiasts and professionals alike. key topics Charge transfer in gemstones Colour centres and defects Effects of heat treatment on gemstone colour Titles The Science Behind Gemstone Colours: Charge Transfer Explained Unlocking the Secrets of Sapphire and Diamond Colours sound bites "Blue sapphire's colour is a football match of ions." "Charge transfer mechanisms reveal gemstone secrets." Chapters 00:00 Introduction to Colour in Gemmology 02:53 Understanding Charge Transfer in Gemstones 05:35 Oxygen to Metal Charge Transfer 08:28 Metal to Metal Charge Transfer: The Sapphire Story 10:58 Organic Molecular Electron Transition 16:22 Colour Centres in Diamonds 22:39 The Science of Synthetic Diamonds 25:27 Understanding Green Diamonds 27:44 The Mystery of Pink Diamonds 30:48 Exploring Colour Centers in Diamonds 35:28 The Future of Gemmology and Podcasting resources Gem-A Gemmology Course - https://gem-a.com/education Instagram - https://instagram.com/facetnationgemmology Email - mailto:facetnation@facetnation.co.uk gemmology, gemstone colour, charge transfer, sapphire, diamond, heat treatment, colour centres, spectroscopy, mineralogy | |||
| 35. Tourmaline Part II: The King of Tourmaline...? | 11 May 2026 | 00:40:07 | |
In this episode of FacetNation, Simon and Lucinda delve into the fascinating world of tourmaline, particularly focusing on its significance in San Diego's gemstone history and the impact of the Dowager Empress Cixi on the pink tourmaline market. They explore the rise and fall of the tourmaline industry, the unique characteristics of the stone, and the methods used to identify it. The conversation is rich with historical anecdotes and insights into the gemmology field, making it an engaging listen for enthusiasts and newcomers alike. Also in this episode, Lucinda and Simon delve into the fascinating world of tourmaline, exploring its color variations, treatments, and the rise of Paraiba tourmaline as a highly sought-after gemstone. They discuss the geological origins of Paraiba tourmaline, its global appeal, and highlight famous examples, including the Ethereal Carolina Divine Paraiba. The episode concludes with a look at the stunning Liddicoat tourmaline slice, showcasing the beauty and complexity of this remarkable gemstone. tourmaline, gemstones, San Diego, Dowager Empress Cixi, gemmology, pink tourmaline, gemstone testing, history, gem market, California tourmaline, Paraiba tourmaline, gemstone treatment, colour variations, gemmology, gemstone value, geological origins, famous gemstones, Liddicoat tourmaline | |||
| 36. Interview: Michelle Mai - Cutting and Designing Gemstones | 18 May 2026 | 00:52:43 | |
Join Lucinda, Simon, and Michelle Mai as they explore the art and science of precision gem cutting. Discover techniques, tools, design principles, and the inspiring journey of a master gem cutter in this engaging episode. gem cutting, gemmology, precision faceting, gemstone design, gem tools, gemstone materials, gem industry, gem education | |||
| 37. Gemstone Fashioning Part One: An Overview for Gemmology Study | 25 May 2026 | 00:49:57 | |
In this episode, Lucinda and Simon explore the fascinating world of gemstone cutting and fashioning, covering essential terminology, techniques, and historical insights crucial for gemologists and enthusiasts alike. gemmology, gemstone cutting, gem fashioning, gemmology exam, gem cutter, gemstone shapes, diamond manufacturing, gemmology history, gemstone grading, jewellery industry | |||
| 38. End of Season 1: Fashioning Part Two - Gemstone faceting techniques | 01 Jun 2026 | 00:41:58 | |
This episode explores the intricate process of diamond manufacturing, from designing and marking to shaping, faceting, and polishing. Hosted by gemmologists Simon and Lucinda, it offers detailed insights into cutting techniques, tools, and the science behind creating stunning gemstones. End of Season One. THANK YOU FOR LISTENING. We will be back, enjoy your summer
diamond manufacturing, gemmology, faceting, cutting techniques, gemstone design, diamond polishing, gemmology course, gemstone tools, gemmology education | |||