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.
Pumpkin Diamond
While it is difficult to tell exactly what status the Pumpkin Diamond currently enjoys, the official GIA web site reports it as "one of the largest Fancy Vivid orange natural color diamonds in the world." The Color Diamond Encyclopedia, on the other hand, terms it "the world's largest fancy vivid orange diamond." In 1997, when it was purchased by The House of Harry Winston, the Gemstone Forecaster referred to it as "the only vivid orange ever graded by the GIA" (which is incorrect as there are several other vivid orange stones graded by GIA and offered for sale on websites, past and present).