AGA Focused on Inclusions

The trend toward the unique is leading many suppliers and retailers to search for untreated ruby, sapphire, and emerald. So it wasn't a surprise that the annual Accredited Gemologists Association's Tucson conference saw members hunting for inclusions, natural gem identification clues, signs of geologic origin, and remnants of micro-enhancements. Presenting the details of what to look for in colored gems were Shane McClure, gem identification director for the Gemological Institute of America; John Koivula, of the American Gem Trade Association Gem Testing Center; and Dr. Michael Krzemnicki, from the Swiss Gemmological Institute (of SSEF). Nick Del Re, of EGL USA and Canada, led the group in examining diamonds for new laser enhancements. Unheated, Untreated It's becoming nearly impossible for a labortory to be 100 percent certain that a stone has not been heated, McClure explained. O
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