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Spinel
The Black Prince’s Ruby. The Timur Ruby. For centuries, spinel, the great imposter, masqueraded as ruby in Europe’s crown jewels.
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Gemstones in the Era of the Taj Mahal and the Mughals
A look at the gem ornamentation of this landmark, as well as the jewels of the Mughal dynasty.
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Star Spinel with Four and Six Rays
A cabochon displaying asterism is found to be an untreated spinel with two different stars.
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Wollastonite in Devitrified Glass Imitating Horsetail Inclusions in Demantoid Garnet
A yellowish green specimen with horsetail-like inclusions is found to be glass rather than demantoid garnet.
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Quarterly Crystal: Wurtzite Phantom in Quartz
For the first time, wurtzite is found as an inclusion in gem material.
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Designs from Erica Courtney
Award-winning jewelry designer Erica Courtney presents four of her creations.
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Interview with a Kenyan Miner and Dealer
Miriam Kamau relates how she became a prominent dealer and miner.
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Rex Guo: The Science and Art of Recutting Fine Gemstones
Rex Guo describes how he sources and systematically recuts faceted stones to unlock their inner beauty.
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Unheated and Unusual Colors
Margit Thorndal of Madagascar Imports offers her perspective on the colored stone market.
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Article
Gemstone ‘Paintings’ Tell Story of a Master Craftsman, Gem and Jewelry Mentor
A jeweler who quietly built a circle of inspiration and influence lives on in generations of GIA-educated jewelers and gemologists.
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Article
M.D. Hohenstine’s Gem Displays: The Process of Creating Popular Window Art with Loose Gemstones
Jeweler M.D. Hohenstine’s spectacular window displays were a beloved tradition in downtown Columbus, Ohio, for more than 50 years.
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