Graders at HRD Antwerp found this one, a HPHT-treated natural diamond inscribed with the report number of an untreated stone.
The move comes after a year-long pilot program.
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The lab said “most” of the diamonds paired with reports stating they were natural and untreated are actually lab-grown or treated diamonds.
One of the highlights of the JCK show in Las Vegas has always been the Italian Pavilion, buzzing with excitement and elegance.
The submitted stone had been cut and polished with “meticulous precision” to match a natural diamond report, the lab said.
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The U.S. division is beginning the process of assessing, then combatting, its impact.