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In response to concerns expressed by the trade over the degree of clarity enhancement in emeralds, GIA Gem Trade Laboratory researchers have devised a methodology to establish the size, number, and position of filled fissures in an emerald, in order to classify the apparent degree of clarity enhancement achieved. The lead article in this issue reports on this research and the resulting classification system. The 10.5 ct emerald crystal in this gold and platinum pendant is from Jos, Nigeria. The pendant was designed by Elena Villa, and manufactured by Hans Dieter Krieger; courtesy of Gebrüder Bank, Idar-Oberstein, Germany. Photo © Harold & Erica Van Pelt—Photographers, Los Angeles, California. |
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