The Cullinan Diamond Mine, also known as the Premier Diamond Mine, has uncovered some of the largest diamonds in the world today and the mine lies over one of the biggest kimberlite pipes in the world (kimberlite is named after Kimberley in South Africa and refers to a type of potassic volcanic rock known to contain diamonds).

The Cullinan Diamond Mine is the third richest diamond producing mine in the country, but its major claim to fame is the discovery of the Cullinan Diamond, exposed here in 1905. The Cullinan Diamond, which now forms part of the British crown jewels, weighed in at 3106 carats.

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