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Emerald imitation
Fake Emerald Comprises Slabs of Glass
Fraudsters created an imitation emerald by assembling fivepieces of glass around a beryl core using a “laborious multi-step cut-and-glueprocess,” according to the Gemological Institute of America (GIA). The inside of the 3.35-carat stone — which the New Yorkbranch received...
Technology Aug 20, 2018 Rapaport News
GIA ruby overgrowth
GIA Spots Lab-Grown Ruby Layer on Natural Stones
Attempts to upgrade the size and color ofgemstones using a layer of synthetic material have been around for decades, butsigns indicate the techniques are changing.The Gemological Institute of America (GIA) recently received two loose,...
Technology Mar 19, 2018 Rapaport News
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