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The 3,106-carat (621 g) Cullinan Diamond (pictured), the largest gem-quality rough diamond ever found, was discovered at the Premier Mine in Gauteng, South Africa.
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Carat (mass)
Unit of mass
The carat (ct) is a unit of mass equal to 200 mg, which is used for measuring gemstones and pearls. The current definition, sometimes known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, and soon afterwards in many countries…Source: Wikipedia (CC BY-SA)
Cullinan Diamond
Largest gem-quality diamond ever discovered
The Cullinan Diamond is the largest gem-quality rough diamond ever found, weighing 3,106 carats (621.20 g), discovered at the Premier No.2 mine in Cullinan, South Africa, on 26 January 1905. It was named after Thomas Cullinan, the owner of the mine. In April 1905, it was put on…Source: Wikipedia (CC BY-SA)
Diamond
Form of carbon
Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Diamond is tasteless, odourless, strong, brittle solid, colourless in pure form, a poor conductor of electricity, and insoluble in water. Another solid form of…Source: Wikipedia (CC BY-SA)
Premier Mine
Especially large diamond mine in South Africa
The Premier Mine is an underground diamond mine owned by Petra Diamonds in the town of Cullinan, 40 kilometres (25 mi) east of Pretoria, Gauteng Province, South Africa. Established in 1902, it was renamed the Cullinan Diamond Mine in November 2003 in celebration of its…Source: Wikipedia (CC BY-SA)
Gauteng
Province of South Africa
Gauteng is one of the nine provinces of South Africa.Source: Wikipedia (CC BY-SA)