Petra Diamonds
The Cullinan mine continues to produce large stones. The Cullinan Heritage, a white diamond, was discovered in September 2009. This stone was the 19th biggest uncut diamond ever found and was sold in February 2010 to Chow Tai Fook Jewellery for $35.5m, the highest price ever paid for an uncut diamond. The previous record was held by Gem Diamonds' Leseli La Letšeng, which was bought for $18.4m by Graff Diamonds in December 2008.
Black, Starr &amp; Frost
2012: Black, Starr & Frost sold the Archduke Joseph Diamond, a 76-carat, D-color, internally flawless diamond, the largest D color internally flawless Golconda diamond in the world for $21.5 million at Christie’s Geneva Magnificent Jewels auction, setting three world records for the sale of a colorless diamond.