U.S. Holiday Closure
The Carlsbad and New York laboratories and schools will be closed on Monday, May 28 in observance of the Memorial Day holiday. These locations will resume regular business hours on Tuesday, May 29.
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Courtesy of: Thomas M. Schneider (Rough)
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Research & News
Lab Notes
New Plastic Imitation Opal from Kyocera
A plastic product that mimics the play-of-color phenomenon of natural opal but has distinctly different gemological properties is now available to consumers.
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Seminar
Advanced Synthetic Diamond Seminar in Hong Kong, June 19
Learn the latest techniques to identify synthetic diamonds from GIA researchers. Seating is Limited.
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Event
2018 GIA Symposium
Scientists and business leaders will gather at a summit of the gem and jewelry industry.
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Gem News International
Aquamarine from Pakistan
A gemological investigation of the aquamarine that has emerged from northern Pakistan in recent years.
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Micro-World
Green Crystals in Yellow Sapphires
Two yellow sapphires yield surprising green inclusions.
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Alumni Spotlight
Making of M.D. Hohenstine’s Gem Displays
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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Micro-World
Type IIa Diamond with Extraordinary Etch Channels
Rare dissolution etch channels are seen in a natural diamond.
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