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Research & News
Gem News International
Fourth Annual Gianmaria Buccellati Foundation Award
A graduate of GIA’s Hong Kong Jewelry Design program hopes her award-winning design will help raise environmental awareness.
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Webinar Series
GIA Knowledge Sessions
Engage in webinars on the most diverse and pressing issues in gemology today, including gemstone origin, laboratory-grown stones and new discoveries in field gemology.
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Micro-world
Thin-Film Fluid Inclusions in Aquamarine
Oblique fiber-optic illumination of thin-film fluid inclusions in Brazilian aquamarine reveals a kaleidoscopic play of interference colors.
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Lab Notes
Asterism in Natural Diamond Cabochons
Two cabochons displaying white four-rayed “stars” are fashioned from one large natural diamond crystal.
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Gem News International
Update on Inclusions in Emeralds from Davdar, China
Testing reveals interesting inclusions in Chinese emeralds to be calcite and dolomite.
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Lab Notes
Prominent Growth Planes Observed in HPHT-Processed CVD Laboratory-Grown Diamonds
DiamondView imaging reveals distinct growth layers in CVD laboratory-grown diamonds treated with an HPHT process.
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