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GIA Spots CVD Stone in Parcel of Treated Melee
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In a rare case, the Gemological Institute of America (GIA)has discovered an irradiated chemical vapor deposition (CVD) diamond in a batch of natural melee aclient had submitted for testing. The GIA’s Tokyo laboratory found the 0.007-carat, irradiatedgreen-blue...
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Polished Markets
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Feb 10, 2019
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Rapaport News
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Marketing
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Mar 26, 2014
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Suncrest Diamonds
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GIA Provides Update on Synthetics, Treatments in Gaborone
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Thomas Moses, the senior vice president of the Gemological Institute of America's (GIA) laboratory and research division, will present “An Update on Synthetic and Treated Diamonds: Detection Techniques” to GIA alumni in Gaborone, Botswana on September...
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Technology
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Sep 21, 2012
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Jeff Miller
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AGL, GRS Collaborate on Descriptions for Lead-Glass Treated Rubies
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Press Release: Ever since the lead-glass treatment of ruby/corundum hit the market nearly 10 years ago, there have been issues over how to describe and represent this material for the trade and laboratories alike. GemResearch Swisslab (GRS) and American Gemological Laboratories (AGL) have...
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Gemstones
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Oct 03, 2011
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AGL
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