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.
Mining in Sierra Leone
The largest diamond found in Sierra Leone, and the third largest diamond in the world, was a 969.8 carat (194 g) rough diamond. It was found in 1972 and named the An-al of Sierra Leone.