In fact, dating back to 2006, Zhecheng county established an industrial park with support infrastructure to focus on the ...

Rough diamonds, fit for cutting, are sold at 41 13s. 4d., to 42 the carat. A carat is rather more than three grains, and 156 carats equal to one ounce Troy. But if the stones ' are above one carat ...

The seller told her it was a rough brown diamond. Runsdorf, in disbelief, said she wanted it verified by the Gemological Institute of America. Sure enough, it came back as a certified 65-carat ...

It has been bad enough that Anglo American-owned De Beers, one of the world’s largest diamond miners, reduced its rough diamond prices ... A lab-grown 1.5-carat diamond was about 80% cheaper ...