Before now, the biggest diamond ever discovered was the 3,106-carat Cullinan, in 1905, near Pretoria, South Africa, which was cut to form the Great Star of Africa and the Lesser Star of Africa, set in the Crown Jewels of Britain.
A statement issued by Lucara stated that the gem-stone which measures 65 millimetres by 56 millimetres by 40 millimetres was recovered by machines at the south lobe of Karowe mine in central Botswana.