IGI Hong Kong Grades the Largest CVD Type IIa Diamond Produced by Shanghai Zhengshi Technology

Quote from Industry News:
International Gemological Institute Hong Kong Branch announced on Monday, November 23, 2020, that their laboratory had graded the largest synthetic Chemical Vapour Deposition (CVD) diamond, which is also the largest synthetic colorless diamond produced by any process, submitted to them by a Chinese Manufacturer, Shanghai Zhengshi Technology. The 12.75-carat, Type IIa, F-color, VVS2-clarity, round brilliant-cut […]