Unusual Glass-and-Quartz Triplet Imitation of Emerald
A Zircon with Strong Photochromic Effect
“Boomerang” Inclusion in a Rough Topaz
"The Ethics of Jewelry" at MetFridays
A summary of “The Ethics of Jewelry” panel, held at New York’s Metropolitan Museum of Art on January 25, 2019.
Inclusions in Natural, Treated, Synthetic, and Imitation Opal
Provides a visual guide to the internal features of natural, treated, synthetic, and imitation opal.
History of Emerald Mining in the Habachtal Deposit of Austria, Part II
The finale of a two-part series on the mining history of Austrian emerald deposits in the Habachtal region.
Large and Fine Demantoid from Russia
Unusually large top-quality faceted Russian demantoid garnets with the characteristic lovely green to yellowish green color excite attention at the Tucson GJX show.
History of the Chivor Emerald Mine, Part I (1880–1925): From Rediscovery to Early Production
Chronicles developments at the Chivor emerald mine in Colombia between 1880 and 1925, based on archival records.
Gem Topaz from the Schneckenstein Crag, Saxony, Germany: Mineralogical Characterization and Luminescence
Characterizes yellow topaz from this historical source, with particular emphasis on its photo luminescence behavior.
Demantoid Garnet with Giant Fluid Inclusion
The First Identified Non-Nacreous Beaded Cultured Pearl
“Electronic Device” in an Atypical Bead Cultured Pearl
GIA’s Hong Kong laboratory looks at a new radio-frequency identification (RFID) technology for tracking cultured pearls.
Preview of Nature Art Science with Paula Crevoshay
Unheated and Unusual Colors
Update on the Green Dragon Demantoid Mine in Namibia
Thoughts on the Chinese and Japanese Gem Markets
Natural Blister From Entombment Of A Pearlfish Within A Pinctada Maxima Shell
Derek Katzenbach: Faceter, Gem Artist, Custom Jeweler
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