featured Research & News

GEM NEWS INTERNATIONAL

Magnesio-Axinite from Merelani, Tanzania

A rare find from a limited occurrence in Tanzania’s Merelani Hills, along with a “Merelani mint” garnet, is seen in Tucson.
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LAB NOTE

First Observation of H4 Defect in CVD Synthetic Diamond

A CVD-grown diamond examined in the Carlsbad lab yields a surprising find.
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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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