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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

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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

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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

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