Where The Rarest Diamonds On Earth Are Formed.
The most priceless diamonds are the clearest as well, without any impurities in its physical appearance. For example, the Cullinan Diamond, named after the chairman of the mine, Thomas Cullinan, was a large gem-quality diamond weighing 3,106.75 carats (621.35 g) discovered at the Premier No. 2 mine in Cullinan, modern-day South Africa, on 26 January 1905. It was presented to King Edward VII of the United Kingdom for his 66th birthday and cut into several polished gems, the largest of which is named Cullinan I or the Great Star of Africa, and at 530.4 carats (106.08 g) it is the largest clear cut diamond in the world. The second-largest is Cullinan II or the Second Star of Africa; at 317.4 carats (63.48 g) it is the fourth-largest cut diamond in the world, and is mounted in the Imperial State Crown. Both diamonds are part of the Crown Jewels.
The Lesotho Promise, a 603 carat (121 g) diamond stone of exceptional colour was unearthed on 22 August 2006 at the Letseng diamond mine in the mountain kingdom of Lesotho. it is the largest reported find this century and the 15th largest diamond ever found. The stone is rated ‘D’, the top colour band for diamonds. The diamond was sold at an auction on 9 October 2006 in Antwerp, Belgium, for US$12.4 million. In July 2007 the finished stones were unveiled. The largest gem cut from the crystal is a 75 carats (15.0 g) pear-shaped diamond
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