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 ...

An Arkansas man found a diamond in the rough: He unearthed a massive nine-carat gem in Crater of Diamonds State Park, the second-largest stone ever discovered there. Lucara That stone pales next ...

The index for 0.30- and 0.50-carat diamonds decreased 0.4% and ... The two parties will be working together to promote natural diamonds. The rough market has been slow, with De Beers maintaining ...