Site map for Lotus Gemology
Bangkok-based gem lab testing colored gemstones for origin, treatments and natural vs. synthetic
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- Enhanced Emeralds/Madagascar Sapphire
- Enhanced Emeralds/Madagascar Sapphire
- Enhanced Emeralds/Madagascar Sapphire
- Madagascar Sapphire
- From Madagascar to Malysheva
- Gem Hunting in Central Asia
- From Madagascar to Tajikistan
- Jade | Stone of Heaven
- People & Places | New Directions in GEM•ology
- Jade | Stone of Heaven
- People & Places | New Directions in GEM•ology
- People & Places | New Directions in GEM•ology
- Lecture | People & Places | Bangkok | 9 July 2008
- Lecture | Hunting gems in Southern Tanzania | Bangkok | 9 March 2009
- Jade | Stone of Heaven
- Humanistic Gemology
- Gemological Heresies
- Heaven Below | Jaipur, India
- Andesine | A Panel Discussion
- People & Places | New Directions in GEM•ology
- Jade | Stone of Heaven
- Padparadscha Sapphire
- Mogok | Valley of Rubies
- Padparadscha Sapphire
- Ruby & Sapphire | A Collector's Guide
- Lecture | Ruby & Sapphire | A Collector's Guide | Bangkok | 26 February 2014
- Ruby & Sapphire | A Collector's Guide
- Gemological Heresies
- Gemological Heresies Part 2
- Lecture | Ruby & Sapphire | A Collector's Guide | Hong Kong | 18 September 2014
- Ruby Inclusions
- Mogok Ruby
- Gemological Heresies
- Ten Thoughts on Gemology
- Gemological Heresies
- Ruby & Sapphire | A Collector's Guide
- Padparadscha Sapphire
- Mogok Ruby
- Ruby & Sapphire | A Collector's Guide
- Gemological Heresies
- Ruby & Sapphire | A Collector's Guide
- Ten Thoughts on Gemology
- Ruby & Sapphire | A Collector's Guide
- Ruby & Sapphire | A Collector's Guide
- Ruby & Sapphire | A Collector's Guide
- Sapphire Around the World
- Madagascar | Sapphire Isle
- Ruby Inclusions
- Ruby & Sapphire | The Secret World
- Seeing Red | Ruby
- Gemological Heresies
- Ruby Inclusions
- Madagascar | Sapphire Isle
- Seeing Red | Ruby
- Gemological Heresies
- Jade | China's Gift to the World
- Gem Color Types
- Seeing Red | Ruby
- Jade | China's Gift to the World
- Ruby & Sapphire | A Collector's Guide
- Gem Color Types
- Journey to the Center of the Gem
- Jade | China's Gift to the World
- Journey to the Center of the Gem
- Ruby & Sapphire | A Collector's Guide
- Jade | China's Gift to the World
- Jade | China's Gift to the World
- Jade | China's Gift to the World
- Jade | China's Gift to the World
- Ruby | Seeing Red
- Madagascar | Sapphire Isle
- Ruby & Sapphire | A Collector's Guide
- Jade | China's Gift to the World
- Jade | China's Gift to the World
- Jade | China's Gift to the World
- Madagascar | Sapphire Isle
- Inside Out: Journey into the Center of a Gem
- Microscopy & Photomicrography
- Jade | China's Gift to the World
- Jade | China's Gift to the World | Copenhagen
- Jade | China's Gift to the World
- A Canary in the Ruby Mine
- A Canary in the Ruby Mine
- Jade | A Workshop
- Jade | A Workshop
- A Canary in the Ruby Mine
- Greasy Business | Oiled Gems Fraud
- Jade | China's Gift to the World
- Greasy Business | Oiled Gems Fraud
- The Mystery of Inclusions | A Panel Discussion
- Earth's Time Capsule | Inclusions in Colored Gems & Diamonds
- Inside Out | Journey into the Center of a Gem
- A Canary in the Ruby Mine
- Seeds and Carats
- Broken Bangle | The Blunder Besmirched History of Jade Nomenclature
- Broken Bangle | The Blunder Besmirched History of Jade Nomenclature
- Broken Bangle | The Blunder Besmirched History of Jade Nomenclature
- Inside Out | Journey into the Center of a Gem
- Inside Out | Journey into the Center of a Gem
- A Canary in the Ruby Mine
- Jade | China's Gift to the World
- Trick or Treatment
- Describing Color in Gems | A Fool's Guide
- Welcome to Rubyland
- Describing Color in Gems | A Fool's Guide
- Trick or Treatment
- Inside Out | Journey into the Center of a Gem
- Welcome to Rubyland
- Broken Bangle | The Blunder Besmirched History of Jade Nomenclature
- Madagascar Sapphire
- Hyperion | Siamese Twins
- Memberships
- Thanks
- Site Map
- Reports
- Resources
- Articles
- Burmese Sapphire Giants
- Burma's Jade Mines | An Annotated Occidental History
- Identifying Yellow Sapphire Using the Blue Filter
- Ruby and Spinel in Tajikistan | Moon Over the Pamirs
- Rutile in Corundum | Following the Silk Road
- Padparadscha Sapphire & the Ownership of Words
- Cobalt-Doped Glass-Filled Sapphires | An Update
- Fiber-Optic Light in Gemology | Living in the Dark Ages
- Gem Inclusions & the Symmetry of Crystals | Inside Out
- Guangzhou Jade Market Puzzle | A Chinese Jade Box
- Gemology in the 21st Century | Betwixt Two Worlds
- Tanzanite Mines of Merelani | Working the Blueseam
- Downtown | Gem Hunting in Tanzania
- Ruby Connoisseurship | Seeing Red
- Sapphire Connoisseurship | Judging Sapphire | Passion Fruit
- Gem Treatment Disclosure | Trust
- Fracture Healing of Ruby | Fluxed Up
- In Search of the Lost Andesine Mines | Part 1 | Hunting Barack Osama in Tibet
- In Search of the Lost Andesine Mines | Part 2 | Faith
- Spinel | Resurrection of a Classic
- Heat Seeker | UV Fluorescence as a Gemological Tool
- The Last Thai Ruby Miner | Red Sky at Dusk
- Mogok Revisited | A Brief Stay in Heaven
- Mogok Geology Primer | Rock Talk
- Ruby, Sapphire & Spinel Auction Records | Under the Hammer
- Sorcerers & Sapphires | A Visit to Madagascar
- Buying at the Source | Dick's Law and Other Sundry Maxims of the East
- Burmese Jade | The Inscrutable Gem
- Jade Buying Guide | Jade Auction Records
- Emerald Buddha | Symbol of the Kingdom of Thailand
- Verneuil Synthetic Corundum ID | Dangerous Curves
- Brilliance, Windows, and Extinction in Gemstones
- Black Prince's Ruby | Blood-Red Souvenir of Conquest | Spinel
- History of Chanthaburi & Pailin | Moontown
- Gem Testing with the Spectroscope
- Pigeon's Blood | Pilgrimage to Mogok – Valley of Rubies
- Burma’s Jade Mines | Tracing the Green Line
- Russian Jade Deposits | From Russia with Jade
- Jade in Upper Burma | Heaven and Hell
- Beryllium Diffusion in Orange Sapphire | The Skin Game
- Lenny Cram's Opal Mine | Fun Down Under
- Hunting the Mother Lode Abroad | Gemological Travel
- FTIR in Gem Testing | FTIR Intrigue
- Ruby, Pink Sapphire & Padparadscha | Walking the Line
- Pleochroism in Faceted Gems | An Introduction
- Emerald & Alexandrite from Russia | A Closer Look
- Testing Yellow Sapphire | Passport to Obscurity
- Seeing Red | Genetics & Color Vision | Lotus Gemology
- Rutile Silk in Sapphire | Discovery in 1878
- Oiled Gems Lab Alert • Lotus Gemology
- Mozambique Ruby | Red Rain Pours into the Market
- Dana Schorr | In Memoriam
- Ruby From Madagascar | Let It Bleed
- 从孔雀蓝到鸽血红 细数宝石之美 • 红蓝宝石之动人色泽
- Inclusions in Gemstones | Hyperion Literature Sources
- Gem Inclusion Pairs | Hyperion Siamese Twins
- จากพีค็อกบลูถึงสีเลือดนก • นิยามแห่งสีจากโลตัสเจมโมโลจี
- Padparadscha or Pretender | An Unusual Pink-Orange Sapphire
- Spinel Inclusions | Beyond Octahedra
- A Sapphire's Secret | Synthetic Yellow Sapphire
- Crystal Optics with the Refractometer
- Oiled Ruby | A Remarkable Visual
- Sapphire With Growth Tube Cluster | Sapphire Inclusions
- Mogok Ruby With Remarkable Twinned Calcite Inclusion
- Six-Rayed Star in Sapphire from Myanmar
- Colored Stone Grading | A Heretic's Guide
- Lao Sapphires | Laos – Land of a Million Elephants... & Sapphires
- Pressure Heated Sapphire | Corundums treated with high temperatures and low pressure (HT+P)
- Jade Books | Collecting the Literature of Jade • Hidden Treasure
- Spinel Inclusions | An Exercise in Aesthetics
- Ruby & Sapphire (Corundum) Inclusions | The Lotus Gemology Crystal Registry
- How to Choose the Best Colored Gem Testing Lab
- Madagascar Ruby & Sapphire | Ruby & Sapphire | A Gemologist's Guide
- Madagascar Sapphire | Low-Temperature Heat Treatment Experiments
- World Sapphire Market Update | 2020 | Lotus Gemology
- FTIR in Gem Testing | A Pink Sapphire Lesson
- Contemporary Jade Carving in China • Interview with Lin Tze-Chuan
- Long-Wave Ultraviolet Torches • A Gemologist’s New Best Friend
- Black Star Sapphire Surprise
- Jade | A Lifetime In Search of Heaven
- Ruby & Sapphire Books | Collecting the Literature of Corundum | Hidden Treasure
- Oiled Spinel & Tanzanite | Shocking Revelations
- Made You Look | The Challenges of Identifying Inclusions at First Sight
- Bubbling Up | Carbon Dioxide Inclusion in Sapphire
- An A-maze-ing Fingerprint in Spinel
- Vietnamese Skyline
- Apatite Oiling | Before and After
- Canary in the Ruby Mine | Low-Temperature Heating of Burmese Ruby
- Apatite in Blue Sapphire
- Blue Apatite in Tanzanian Garnet
- Yellow Sapphires with Unstable Color
- Curved Banding in Flame-Fusion Synthetic Sapphires
- Describing Color in Gems | A Fool's Guide
- The Hardness of Fei Cui Jade | A Gemological Perspective
- Meet the Extraordinary 40 | Richard Hughes Honored by Jewellery News Asia
- Detecting Corundum Fillers with the Long-Wave UV Torch
- From Fei Cui to Jadeite and Back | Questions and Answers
- Gem Treatment Disclosure | Notes from the Eastern Front
- 'Accurate Improv' | A Bit of ChatGPT Gold
- Con-juring Ruby | A Heated Flux Synthetic
- The Gemologist's Core Library | Classic Books on Gemology, Jewelry and Mineralogy
- Reference Books on Gemology, Jewelry and Mineralogy
- Green Fire | Lotus Gemology's Guide to the Literature of Emerald
- An Alexandrite-Emerald Intergrowth, Reportedly from Russia
- Books
- Corundum | 1990
- The Book of Ruby & Sapphire | 2012
- Ruby & Sapphire (Corundum) | 1992
- Broken Bangle | The Blunder-Besmirched History of Jade Nomenclature | 2024
- Nephrite and Jadeite | First English Translation of this 1875 Classic | 2025
- Ruby & Sapphire | A Gemologist's Guide | 2017
- Ruby & Sapphire | A Collector's Guide | 2014
- Terra Spinel — Terra Firma | 2010
- Ruby & Sapphire | 1997
- Ruby & Sapphire Colors | From Peacock to Pigeon's Blood | 2017
- Inside Out | GEM•ology Through Lotus-Colored Glasses | 2020
- Jade | A Gemologist's Guide | 2022
- Sherlock • Inclusion Research
- 4 Treasures • Reference Database
- Book/Instrument Reviews
- Book Review | Photoatlas of Inclusions in Gemstones, Volume 3 | Lotus Gemology
- Book Review | Photoatlas of Inclusions in Gemstones, Volume 2 | Lotus Gemology
- Book Review | A Geologist Speculates | Lotus Gemology
- Book Review | Imperial Jade of Burma & Mutton-Fat Jade of India | Lotus Gemology
- Instrument Review | Presidium Synthetic Ruby Identifier
- Book Review | The Eduard Josef Gübelin Story: The Art and Science of Gems | Lotus Gemology
- Instrument Review | GemmoRaman-532
- Book Review | Ruby | 2017 | Joanna Hardy
- Book Review | Ruby, Sapphire & Spinel | An Archaeological, Textual and Cultural Study
- Book Review | Diamond | An Early History of the King of Gems
- Fine Images for Sale
- Lotus Bibliography
- Articles
- Contact
Hidden Menu
- Privacy Policy
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- Other Articles
- Book | Ruby & Sapphire | A Collector's Guide | 2014 | Order Page
- Book | Ruby & Sapphire | A Gemologist's Guide | Order Page
- Book | Jade | A Gemologist's Guide | Order Page
- Book | Jade | A Gemologist's Guide | Limited Edition Order Page
- Book | From Peacock to Pigeon's Blood | Order Page
- Lotus Image Galleries
- Book | Inside Out | Gemology Through Lotus-Colored Glasses | Order Page
- Auctions & Press • Lotus Gemology lab in the news
- Test FAQS
- Book | Broken Bangle | Jade Nomenclature Order Page
- Book | Heinrich Fischer's Nephrite and Jadeite