Diamonds: Lab-Grown Diamonds Arrive at the GIA and More



Lab Groan In June, a parcel of 10 undisclosed lab-grown created diamonds showed up at the Gemological Institute of America’s lab in Hong Kong. The incident was announced in the Gems & Gemology monthly eBrief. The news comes on the heels of the International Gemological Institute’s May alert that 600 synthetic colorless diamonds were submitted to its Antwerp lab without disclosure. The 10 stones in Hong Kong were swiftly identified as lab-created, the GIA says. The stones were comparable in quality to naturals, and were round brilliants, ranging from 0.30 to 0.35 ct., with F–H color grades, and clarity grades ranging from VVS1 to VVS2 (though one diamond received a VS1). As with the Antwerp parcel, the stones found in Hong Kong were described as “similar” to those produced by manufacturer Gemesis, as they were both CVD-grown and treated with HPHT afterward. I
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