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

Several years earlier, Asscher had successfully cleaved and polished the Excelsior diamond, a 971-carat rough that was at the ... are sized to a microscopic 50 microns (five hundredths of a ...

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 ...

Canada’s Lucara Diamond has announced the recovery of a 1,094-carat rough diamond from its Karowe Mine in Botswana. The company noted that this find is the second of such magnitude this year ...