Facet Nation: A Gemmology Podcast

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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 - [email protected]

gemmology, colour filters, Chelsea filter, pleochroism, gemstone identification, gem testing, gem cutting, gemmology tools
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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
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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
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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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