Cullinan Diamond
The Cullinan diamond was found below the surface at Premier Mine in Cullinan, Transvaal Colony, by Frederick Wells, surface manager at the mine, on 26 January 1905. It was approximately long, wide, deep, and weighed . Newspapers called it the "Cullinan Diamond", a reference to Sir Thomas Cullinan, who opened the mine in 1902. It was three times the size of the Excelsior Diamond, found in 1893 at Jagersfontein Mine, weighing . Four of its eight surfaces were smooth, indicating that it once had been part of a much larger stone broken up by natural forces. It had a blue-white hue and contained a small pocket of air, which at certain angles produced a rainbow, or Newton's rings.
Princie Diamond
The Princie Diamond is an approximately 34.65 carat cushion-cut fancy intense pink diamond discovered 300 years ago in the Golconda mines. Christie's (who auctioned it on 16 April 2013, when it fetched a price of 39.3 million dollars) say that the Princie Diamond is believed to be the third largest pink diamond in the world after the Daria-i-Noor (c. 175 to 195 carats) the Noor-ol-Ain (c. 60 carats) which are both part of the Iranian Crown Jewels but which were both cut, according to experts, from one single c. 242 carat pink diamond, and the Pink Star (formerly known as the Steinmetz Pink), a diamond weighing 59.60 carats.