This 5.19-carat CVD synthetic diamond is the largest that GIA has identified to date.
Photo by Johnny Leung and Tony Leung
The Gemological Institute of America (GIA) recently identified a 5.19-carat synthetic diamond, produced using chemical vapor deposition (CVD) technology. The stone is the largest lab-grown diamond so far examined by GIA.
According to GIA, the stone – a cushion-cut, modified brilliant measuring 10.04mm by 9.44mm by 6.18mm – was submitted to GIA’s Hong Kong laboratory for grading. The stone was not disclosed as a synthetic diamond, noted GIA.
Using the lab’s standard screening and testing processes, it was identified as a CVD synthetic. A GIA Identification Report was issued after examination, and the stone was inscribed on the girdle with a report number and the words “laboratory grown,” adhering to GIA’s protocols for undisclosed synthetics.
“This is the largest CVD synthetic diamond GIA has examined to date, and the largest reported in the jewellery industry. It had J-equivalent colour grade and VS2-equivalent clarity, comparable to a high-quality natural counterpart,” the lab said.