One of the most famous diamonds is the Great Star of Africa,[Picture] weighing 530.2 carats, which was cut from the world's largest rough diamond, the Cullinan I. The historic Cullinan diamond, found in South Africa in 1905, weighed an astounding 3,106.75 carats. It was cut into the Great Star of Africa (Cullinan I), the Lesser Star of Africa (known as the Cullinan II, weighing 317.40 carats[Picture]), and 103 other diamonds of nearly flawless clarity. The principal diamonds are mounted in the British crown jewels.Throughout the years rumors have spread of a second half of the Cullinan diamond, rumors has it that before Frederick Wells sold the diamond to Sir Thomas Cullinan he broke off a peice which sized in at about 1500 to 2000 carats. If this were to be true then the original Cullinan diamond would have weighed in at about the 5000 carat mark.