The biggest Diamond found after 102 years

The world's biggest diamond, believed to be twice the size of the Cullinan, has been discovered in the North-West Province of South Africa. The diamond is expected to attract furious bidding from buyers worldwide and could fetch up to £15m.

http://www.guardian.co.uk/southafrica/story/0,,2157446,00.html

The Cullinan Diamond, found by Frederick Wells, surface manager of the Premier Diamond Mining Company in Cullinan, Gauteng, South Africa, on January 26, 1905, is the second largest rough gem-quality diamond ever found, at 3,106.75 carats (621.35 g). Although a carbonado found in Brazil weighed more than 3,600 carats (720 g), no gem-quality material could be extracted from it. The stone was named after Sir Thomas Cullinan, the owner of the diamond mine.
http://en.wikipedia.org/wiki/Cullinan_Diamond