Labs Continue Grading Controversial Stones

Responding to criticism from the leading diamond associations, the gemological labs say their policies on grading synthetics and HPHT-treated stones are in the industry's interest. The two major associations, meeting recently at the World Diamond Congress in New York, said labs should not issue grading reports for synthetic stones. But the only major lab that issues reports for synthetics, EGL USA, says it has no plans to stop. "Providing a grading report for a synthetic diamond generates greater confidence in our industry and helps the trade and consumers differentiate naturals from synthetics," an EGL USA statement says. "[It also] minimizes the risk of some producers going underground to create an alternative market that could potentially damage the industry." The Gemological Institute of America's Gem Laboratory does not grade synthetics but grades HPHT-treated stones. The asso

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