By Erika Winters
GIA reported that 10 undisclosed CVD (chemical vapor deposition) grown synthetic diamonds were identified at the Hong Kong laboratory in June 2012. The synthetics appeared comparable to high-quality natural diamonds and ranged from .30 to .35 carats of F-H color and VVS1 to VS1 clarity. Microscopic evaluation revealed no major inclusions, but the synthetics did display weak graining and tiny pinpoints. The samples were inert to long-wave UV and displayed very weak yellow to green-yellow fluorescence after short-wave UV exposure.
