Cullinan Diamond
The Cullinan Diamond is the largest gem-quality rough diamond ever found, weighing , discovered at the Premier No. 2 mine in Cullinan, South Africa, on 26 January 1905. It was named after Thomas Cullinan, the mine's chairman.
Letseng diamond mine
On 13 September 2007 Gem Diamonds, Ltd. announced that it had found a diamond, making it the 18th largest diamond ever found. It was sold to the Graff-SAFDICO partnership for $10.4 million.