With more gemstone varieties being treated than ever before, the Accredited Gemologists Association (AGA) will use its 2008 Tucson Conference to ensure that gemologists are in the know on the latest treatments and detection techniques.

"More gemstone varieties are being treated than ever before, in many new ways," the AGA said in its release. "But not all treatments are equal in terms of permanence and impact on value, and it is increasingly difficult for buyers and sellers to know for sure what they are buying and selling, since many dealers don't know themselves."

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