This article examines the mysteries of rough emerald cutting through a spectacular pair of cat's-eye emeralds from Colombia.
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Emeralds are again being mined in the historic district of the Ural Mountains. Physical, chemical, spectroscopic and microscopic characteristics of stones from the recent production are presented and compared with data on older samples as well as those reported in the literature.
Read MoreThe higher the chromium content in synthetic emerald overgrowth, the darker the coating and appearance of the stone will be.
Read MoreFrom the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.
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