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Opals Revisited
“Ti-Sapphire”: Czochralski-Pulled Synthetic Pink Sapphire from Union Carbide
One of the most interesting of the commercially available Czochralski pulled synthetic corundums is pink “Ti-sapphire.”
Rose-Shaped Cloud Inclusion in Diamond
Copper-Bearing Tourmalines from New Deposits in Paraíba State, Brazil
Two new deposits of Cu-bearing tourmaline have been found in Paraíba State, Brazil, not far from the original source at Mina da Batalha.
Quarterly Crystal: Fluorite in Quartz from China
Colored Bands in CVD-Grown Diamond
34th International Gemmological Conference
A report from the 34th IGC, held in Vilnius, Lithuania in August 2015.
Zeki Karaca Jewelry: Luxury Pens
YAG with Flux-Filled Fingerprints
The author recently examined a 3.58 ct yellowish green yttrium aluminum garnet, a manufactured product known in the trade as “YAG,” that contained numerous large flux-filled fractures.
Inamori Synthetic Cat's-Eye Alexandrite
Irreversible Photochromism in Synthetic Sapphire
“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.