Observations on GE-Processed Diamonds: A Photographic Record
Observations made at GIA on 858 GE-processed diamonds revealed several interesting features that may be diagnostic of this kind of diamond. Specifically, a significant percentage exhibited a slightly hazy appearance, noticeable internal graining, and other unusual internal features.
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Man-Made Jewelry Malachite
The Sapphires of Penglai, Hainan Island, China
Polynesian Black Pearls
Historically, natural black pearls have been one of the rarest and most exotic of gem materials.
Chicken-Blood Stone from China
The Growth of Brazil-Twinned Synthetic Quartz and the Potential for Synthetic Amethyst Twinned on the Brazil Law
Thermal Alteration of Inclusions in "Rutilated" Topaz
Faceted colorless topaz containing acicular inclusions has been offered for sale as
Winter 2018 G&G Publication Information
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