Research & News
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.
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.
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.
Asterism in Natural Diamond Cabochons
Two cabochons displaying white four-rayed “stars” are fashioned from one large natural diamond crystal.
Update on Inclusions in Emeralds from Davdar, China
Testing reveals interesting inclusions in Chinese emeralds to be calcite and dolomite.
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.