featured Research & News

LAB NOTES

Multi-Elemental Diffused and Melt-Grown Synthetic Sapphire

GIA examines this material for the first time.
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MICRO-WORLD

Negative Crystals in Sapphires

Sapphires from Baw Mar host multiphase inclusions in appealing patterns.
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MICRO-WORLD

Quarterly Crystal: Mystery in Topaz

A topaz hosting a group of inclusions is examined in the Carlsbad lab.
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LAB NOTES

Paraíba Tourmaline with Unusual Coating

A coated Paraíba tourmaline is seen for the first time at a GIA lab.
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GEM NEWS INTERNATIONAL

Importance of the Secondary Market for Fine Gems

Exceptional gems that are recirculated in the gem market make an impact at the Tucson shows.
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