Gemological Characteristics of Coated Jadeite Jade
Yellow Topaz from Germany, Emerald Mining in Austria’s Habachtal Region, a Return to Tucson, and More…
Blue Sapphire Lord of the Rings Pendant
Mercury Free Mining Pilot Program
Star Topaz from Vietnam
Identification of Natural, Reconstructed, and Imitation Root Amber
A “Cobalt Blue” Gahnospinel
Four-Rayed Star Chrysoberyl
Large Faceted Pallasitic Peridot
Two Black Non-Nacreous Bead Cultured Pearls from Pinctada margaritifera
Aegirine in Poudretteite
15 Carat HPHT Synthetic Diamond
Expanded Diamond Surface Due to Radiation Staining
The author examined a 0.56 ct Fancy grayish bluish green diamond with prominent green radiation stains.
“Star of David” Spinel Twin Crystal with Multiphase Inclusions from Mogok
A rare spinel, featuring a Star of David pattern and multiphase inclusions, is examined in Bangkok.
Inclusion-Rich Black Topaz from the Thomas Mountains, Utah
Topaz is an important gemstone that occurs in various colors.
钻石中非同寻常的哑铃状内含物 (英语)
Examination of a 0.40 ct near-colorless round brilliant diamond with a large inclusion resembling a dumbbell
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.
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