Insights from recent episode analysis
Audience Interest
Podcast Focus
Publishing Consistency
Platform Reach
Insights are generated by CastFox AI using publicly available data, episode content, and proprietary models.
Total monthly reach
Estimated from 10 chart positions in 10 markets.
By chart position
- 🇦🇺AU · Natural Sciences#6030K to 100K
- 🇬🇧GB · Natural Sciences#1185K to 30K
- 🇨🇦CA · Natural Sciences#1465K to 30K
- 🇳🇱NL · Natural Sciences#6410K to 30K
- 🇦🇪AE · Natural Sciences#3710K to 30K
- Per-Episode Audience
Est. listeners per new episode within ~30 days
40K to 142K🎙 ~2x weekly·31 episodes·Last published 4w ago - Monthly Reach
Unique listeners across all episodes (30 days)
80K to 283K🇦🇺35%🇬🇧11%🇨🇦11%+7 more - Active Followers
Loyal subscribers who consistently listen
32K to 113K
Market Insights
Platform Distribution
Reach across major podcast platforms, updated hourly
Total Followers
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Total Plays
—
Total Reviews
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* Data sourced directly from platform APIs and aggregated hourly across all major podcast directories.
On the show
Recent episodes
38. End of Season 1: Fashioning Part Two - Gemstone faceting techniques
Jun 1, 2026
41m 58s
37. Gemstone Fashioning Part One: An Overview for Gemmology Study
May 25, 2026
49m 57s
36. Interview: Michelle Mai - Cutting and Designing Gemstones
May 18, 2026
52m 43s
35. Tourmaline Part II: The King of Tourmaline...?
May 11, 2026
40m 07s
34. Gemstone Colour: Charge Transfer and Colour Centres
May 4, 2026
38m 19s
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| Date | Episode | Description | Length | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 6/1/26 | 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... | 41m 58s | ||||||
| 5/25/26 | 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... | 49m 57s | ||||||
| 5/18/26 | 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 ... | 52m 43s | ||||||
| 5/11/26 | 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 ... | 40m 07s | ||||||
| 5/4/26 | 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 ... | 38m 19s | ||||||
| 4/27/26 | 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... | 42m 19s | ||||||
| 4/20/26 | 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... | 28m 09s | ||||||
| 4/13/26 | 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... | 55m 24s | ||||||
| 3/30/26 | 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... | 41m 12s | ||||||
| 3/23/26 | 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 ... | 36m 36s | ||||||
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| 3/16/26 | 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... | 32m 08s | ||||||
| 3/9/26 | 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 ... | 55m 39s | ||||||
| 3/2/26 | 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... | 52m 43s | ||||||
| 2/23/26 | 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... | 1h 02m 52s | ||||||
| 2/16/26 | 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... | 52m 55s | ||||||
| 2/9/26 | 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... | 25m 20s | ||||||
| 2/2/26 | 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 ... | 1h 07m 05s | ||||||
| 1/26/26 | 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. ... | 1h 02m 10s | ||||||
| 1/19/26 | 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... | 44m 54s | ||||||
| 1/12/26 | 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... | 56m 41s | ||||||
| 1/5/26 | 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... | 43m 22s | ||||||
| 12/22/25 | 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... | 49m 57s | ||||||
| 12/15/25 | 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... | 45m 56s | ||||||
| 12/8/25 | 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... | 28m 19s | ||||||
| 12/1/25 | 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... | 52m 07s | ||||||
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Chart Positions
10 placements across 10 markets.
Chart Positions
10 placements across 10 markets.