AGS laboratories adopts WFDB HP/HT recommendations

American Gem Society (AGS) Laboratories announced that it will immediately adopt the new high pressure, high temperature (HPHT) diamond treatment guidelines recently recommended by the World Federation of Diamond Bourses (WFDB) Committee on Consumer Confidence.

Under these recommendations, AGS Laboratories will laser inscribe HP/HT on the girdle of the treated diamond. In addition, AGS Laboratories will note HP/HT treatment on its Diamond Documents and specify that the treatment has changed the color of the diamond.

“We’ve seen an increase in the number of HP/HT treated diamonds coming into the lab,” said Peter Yantzer, executive director of American Gem Society Laboratories. “We believe that supporting an industry wide system will better protect the consumer.”

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