Research & News
Paraíba-Like Synthetic Sapphire
Two flame-fusion synthetic sapphires with a Paraíba-like color are examined at GIA’s Carlsbad lab.
Cat’s-Eye Nephrite Jade from Washington State
A deposit in the Pacific Northwest, largely dormant since the 1970s, produces chatoyant nephrite and hosts a spectacular “jade cave.”
CVD Layer Grown on Natural Diamond
A composite of synthetically grown and natural diamond was recently identified by the Carlsbad laboratory.
Lazurite in Spinel
A light gray spinel features a striking vibrant blue lazurite inclusion.
Hand-Carved Cameos from Italy
Unique shell cameos are seen at the GJX show in Tucson.
Masterpieces in Miniature: Engraved Gems from Prehistory to the Present
Review of Masterpieces in Miniature: Engraved Gems from Prehistory to the Present by John Boardman and Claudia Wagner.