Podcast · Tech & Science

Facet Nation: A Gemmology Podcast

by Facet Nation · English · Tech & Science

Facet Nation is a new kind of gemmology podcast. Rigorous enough for serious students, but fascinating and funny enough for anyone craving an inside look at gemstones, jewellery and the shadowy world surrounding them. Part revision aide, part storytime, Lucinda and Simon are your qualified guides to

New episodes: Weekly
Typical length: 46 min
Latest: 5 Oct 2026
Language: English

Latest episode

5 Oct 2026 · 41 min

42. Garnet: Part Two - Tsavorite, Faberge and the fate of Campbell Bridges

Send us Fan Mail In part two, we explore the Ugrandite series of garnets, including their chemistry, history, and the stories behind famous varieties like Tsavorite and Demantoid. Join us for a deep dive into gemstone lore, geology, and the vibrant stories that make these stones so captivating. key topics The isomorphous series of garnets and their chemical formulas The story of tsavorite's discovery and its geological background The history and lore of demantoid garnet and its c...

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Earlier episodes 29 most recent

S2 · E41 · 21 Sep 2026 · 58 min
41. Interview: Arya Akhavan returns! Growing Exotic and Novel Lab Sapphires
Send us Fan Mail Arya Akhavan returns! To reveal the secrets he couldn't disclose last time. Arya has been growing sapphires! And not just any sapphires, every colour of sapphire you can imagine. A gemologist and scientist, Arya shares groundbreaking insights into synthetic gemstone production, including sapphire growth, colour manipulation, and future innovations. Discover how science and passion are transforming the gem industry and what it means for collectors, faceters and jewellers alike...
S2 · E40 · 7 Sep 2026 · 39 min
40. Season 2: Garnet Part One
Send us Fan Mail Hello and welcome back to Season 2 of Facet Nation: A Gemmology Podcast In this episode, we explore the fascinating world of garnets, their varieties, history, and gemmological properties, revealing insights that will deepen your understanding of these captivating gemstones. key topics Garnet varieties and their chemical compositions Historical significance and trade of garnets Gemmological properties and identification techniques The spectrum of garnet colours and the...
S2 · E39 · 2 Sep 2026 · 19 min
39. Season 2 Preview and Summer Catch Up
Send us Fan Mail In this mini episode, Simon shares his summer adventures including gem mining in Oregon, visiting the Spectrum Sunstone Mine, and participating in gemmology events. Lucinda discusses her new gemmology brand, TikTok presence, and recent travels, highlighting the vibrant gem community and upcoming events. Gem mining in Oregon Spectrum Sunstone Mine visit Gemmology events and community outreach Lucinda's new gemmology brand and TikTok presence Travel stories and gem history ins...
S1 · E38 · 1 Jun 2026 · 42 min
38. End of Season 1: Fashioning Part Two - Gemstone faceting techniques
Send us Fan Mail 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 key topics Diamond designing and marking Dividing and cleaving methods Shaping and faceting techniqu...
S1 · E37 · 25 May 2026 · 50 min
37. Gemstone Fashioning Part One: An Overview for Gemmology Study
Send us Fan Mail 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. key topics Gemstone cutting terminology Differences between lapidary and diamond manufacturing Factors influencing gemstone cut decisions Historical gem cutting techniques and innovations Practical tips for evaluating rough stones Gem Cutting Vocabul...
S1 · E36 · 18 May 2026 · 53 min
36. Interview: Michelle Mai - Cutting and Designing Gemstones
Send us Fan Mail 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. Precision gem cutting techniques Tools and machinery for faceting Design principles for gemstones Materials used in gem cutting The journey of a gem cutter Guest name Michelle Mai Titles Mastering Precision Gem Cutting: Techniques and Inspiration ...
S1 · E35 · 11 May 2026 · 40 min
35. Tourmaline Part II: The King of Tourmaline...?
Send us Fan Mail 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 ...
S1 · E34 · 4 May 2026 · 38 min
34. Gemstone Colour: Charge Transfer and Colour Centres
Send us Fan Mail 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 ...
S1 · E33 · 27 Apr 2026 · 42 min
33. Tourmaline Part One: Conquistadors and the party where everyone's invited
Send us Fan Mail Join us as we explore the fascinating world of tourmaline, its formation, varieties, and historical significance, with insights from gemmologists Lucinda and Simon. Tourmaline's chemical complexity and isomorphous series Formation of tourmaline in pegmatites and metamorphic rocks Varieties of tourmaline and their unique features Historical lore and the myth of pyroelectricity Testing and identifying tourmaline in gemmology Simon and Lucinda Titles The Hidden World of Tourm...
S1 · E32 · 20 Apr 2026 · 28 min
32. Causes of Gemstone Colour: Dispersed Metal Ions
Send us Fan Mail 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. Dispersed metal ions and their role in gemstone colour Valency states of transition metals and their effects Atomic environment and its influence on gemstone hue Luminescence and fluorescence in g...
S1 · E31 · 13 Apr 2026 · 55 min
31. Interview: Ian Dun FGAA FGSGA, Federal President Gemmological Association of Australia
Send us Fan Mail 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. key topics Gemological education and certification in Australia Australian gemstones: Opal, Sapphire, and more Advances in gemstone grading and identification gu...
S1 · E30 · 30 Mar 2026 · 41 min
30. Colour: Physical Optics and Colour Phenomena
Send us Fan Mail 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. key topics Physical optics in gemstones Iridescence and wave interference Thin film interference in gem materials Unveiling Gemstone Colours: The Science of Iridescence and More The Hidden Physics of Gemstone Beauty: A Deep Div...
S1 · E29 · 23 Mar 2026 · 37 min
29: Organics: Coral. Don't bleach it! Or Maybe you should.
Send us Fan Mail 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 ...
S1 · E28 · 16 Mar 2026 · 32 min
28. Colour: Pleochroism and Colour Filter Gem testing
Send us Fan Mail 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 an...
S1 · E27 · 9 Mar 2026 · 56 min
27. Jadeite: A Cultural Icon
Send us Fan Mail 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 ...
S1 · E26 · 2 Mar 2026 · 53 min
26. Interview: Andrew Geoghegan - Jewellery Design, Branding and Keeping it Real
Send us Fan Mail 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 Inspi...
S1 · E25 · 23 Feb 2026 · 1 hr 3 min
25. Interview: Wim Vertriest - GIA Field Gemmology, Gem Identification and Mozambique Rubies
Send us Fan Mail 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...
S1 · E24 · 16 Feb 2026 · 53 min
24. Colour: The Spectroscope and Selective Absorption in Gems
Send us Fan Mail 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 person...
S1 · E23 · 9 Feb 2026 · 25 min
23. Colour: An introduction
Send us Fan Mail 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 perc...
S1 · E22 · 2 Feb 2026 · 1 hr 7 min
22. Interview: Justin Prim - gemcutter, author, teacher and historian
Send us Fan Mail 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 ...
S1 · E21 · 26 Jan 2026 · 1 hr 2 min
21. Interview: Jeff Hapeman, Earth's Treasury. Montana Sapphires and more
Send us Fan Mail 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. ...
S1 · E20 · 19 Jan 2026 · 45 min
20. The Refractometer: Gem testing and how it works
Send us Fan Mail 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 flu...
S1 · E19 · 12 Jan 2026 · 57 min
19. Gemmology Exam Preparation: What to expect
Send us Fan Mail 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...
S1 · E18 · 5 Jan 2026 · 43 min
18. The Best Kept Secrets of Spinel
Send us Fan Mail Summary In this episode, Lucinda and Simon explore the fascinating world of spinel, a gemstone often overshadowed by rubies and sapphires. They discuss its chemical composition, colour variations, and historical significance, as well as the modern rise of synthetic spinel. The conversation delves into the properties that make spinel a desirable choice for jewellery, its unique inclusions, and the testing methods used to identify it. The hosts also highlight famous spinels th...
S1 · E17 · 22 Dec 2025 · 50 min
17. Interview: Rosie Young. Lab Gemmology and all things Sunstone
Send us Fan Mail 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 importanc...
S1 · E16 · 15 Dec 2025 · 46 min
16. Light & Gem Testing Instruments: The Polariscope
Send us Fan Mail 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 Fasc...
S1 · E15 · 8 Dec 2025 · 28 min
15. Live Episode - Tanzanite - The Gem and Mineral Show London
Send us Fan Mail 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 significa...
S1 · E14 · 1 Dec 2025 · 52 min
14. Light and Optics in Gemstones
Send us Fan Mail 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 o...
S1 · E13 · 24 Nov 2025 · 47 min
13. Interview: Video Game Gemstones and Precision Gem cutting with Arya Akhavan
Send us Fan Mail 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 bec...

About Facet Nation: A Gemmology Podcast

Facet Nation: A Gemmology Podcast is a English tech & science podcast from Facet Nation. Melo plays each episode straight from the publisher's own feed — no ads added, no account needed — and remembers where you stopped, in this browser only.

Publisher: Facet Nation
Language: English
Category: Tech & Science
New episodes: Weekly
Typical length: 46 min
Latest episode: 5 Oct 2026
Feed: RSS — paste into any podcast app
Apple Podcasts: podcasts.apple.com/podcast/id1837015393

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