sapphire
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Discover the Gemstones: Ruby & Sapphire Exhibition | Hong Kong
Experience the hidden world of ruby & sapphire in this exhibition with Lotus Gemology and Van Cleef & Arpels' L'École School of Jewelry Arts
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Downtown | Gem Hunting in Tanzania
Since the late 1960's, East Africa has been home to some of planet earth's greatest gem discoveries. And yet, little has been written about certain of these finds. In the autumn of 2007, the authors set out to fill in the gaps, specifically regarding Tanzania's Mahenge, Songea and Tunduru regions.
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Fiber-Optic Light in Gemology | Living in the Dark Ages
The role of fiber-optic lighting in gemological microscopy.
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FTIR in Gem Testing | A Pink Sapphire Lesson
A discussion of DRIFTS vs the Beam Condenser FTIR attachment in the testing of pink sapphire. The DRIFTS accessory is generally much better at unmasking heat treatment in ruby and sapphire.
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Gem Inclusion Pairs | Hyperion Siamese Twins
Why should Hugh Hefner be the only one to enjoy twins? This special Hyperion Inclusion Gallery features images from the Lotus Gemology Hyperion Inclusion Database, but are shown as pairs, all the better to compare one form of beauty with another.
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Gem Testing with the Spectroscope
Many gemologists have difficulty mastering the direct-vision spectroscope. This article eases the pain. -
Gem Treatment Disclosure | Trust
The ethics of gem enhancement disclosure.
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Gems & Gemology Lectures | Lotus Gemology Bangkok
Lotus Gemology's gemologists have lectured extensively about a wide variety of gemological topics including ruby, sapphire, jade, and more.
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Heat Seeker | UV Fluorescence as a Gemological Tool
One of the greatest gemological challenges is determining if a ruby or sapphire has been heat treated. UV fluorescence can assist in that identification, as well as detecting fillers in emerald.
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History of Chanthaburi & Pailin | Moontown
The Thai city of Chanthaburi (จันทบุรี) may be small, but it has played an important role in both the history of Thailand and the gem trade. Taking its name from the Sanskrit word for moon ('chan'), this petite town is among the most charming in the Land of Smiles.
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Identifying Yellow Sapphire Using the Blue Filter
Introducing the blue filter as a gemological tool to separate natural and Verneuil synthetic yellow sapphires.
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Inclusions in Gemstones | Hyperion Literature Sources
For those who wish to explore the literature of inclusions in gemstones further, we have selected the following articles and books that are of particular merit. Most of these are cited in the Lotus Gemology Hyperion Inclusion Database, but are listed below in a more convenient summary format. Many of the links will allow you to download a PDF copy of the original article.
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Lao Sapphires | Laos – Land of a Million Elephants... & Sapphires
The history of the Lao sapphire mines at Ban Huay Xai is detailed, along with modern mining by Hong Kong based Sino Resources Mining Corp. Ltd. from 2006–2012.
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Lecture | Inside Out: Journey into the Center of a Gem | Paris | 12 March 2020
Plunge into the fascinating microworld of ruby and sapphire with award-winning photomicrographer E. Billie Hughes.
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Lecture | Madagascar | Sapphire Isle | Tucson | 6 February 2020
Lotus Gemology's E. Billie Hughes looks at the important sapphire producing localities in Madagascar, along with the key gemological features that can help separate them from other sapphire sources.
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Lecture | Microscopy & Photomicrography | Birmingham, UK | 16 March 2020
Lotus Gemology's E. Billie Hughes will captain a special workshop devoted to gemological microscopy and photomicrography.
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Lecture | Ruby Inclusions | Hong Kong | 18 September 2014
A description of the inclusions found in ruby around the world, including Myanmar, Thailand/Cambodia, Vietnam, Tajikistan, Madagascar and Mozambique.
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Lectures | Ruby & Sapphire | A Collector's Guide | Hong Kong | 18 September 2014
A lecture on the trading and grading of ruby and sapphire, with an emphasis on the fine points of what collectors should look for.
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Lotus Gemology Price List
Lotus Gemology produces what we feel are the finest gem testing reports in the gemological field. Each report includes gemstone identification, treatment identification and, in certain cases (mainly ruby, sapphire, spinel, emerald and jadeite jade) origin determination.
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Mogok Geology Primer | Rock Talk
A look at the geology of Myanmar's Mogok Stone Tract, home to pigeon's blood rubies and so much more…