Research & News
Alum’s Lifelong Quest: Searching for Jewelry Unicorns
Alan Nacht continues his family’s legacy - Bernard Nacht & Co. – and his quest for unforgettable jewelry.
Iridescent Tabasco Geode
A unique Tabasco geode containing greenish blue botryoidal chalcedony displays iridescent colors.
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.
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.”
Rough Diamond with Unusual Coating of Fake Green “Radiation Stains”
Chromium oxide powder imitates green “radiation stains” on a rough diamond crystal submitted to the Carlsbad laboratory.