Star of Sierra Leone Diamond
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The 968.9-carat Star of Sierra Leone diamond was discovered by miners on February 14, 1972, in the Diminco alluvial mines in the Koidu area of Sierra Leone. It ranks as the fourth-largest gem-quality diamond and the largest alluvial diamond ever... Wikipedia
Discovered: Feb 14, 1972
Mine of origin: Diminco mine
Original owner: Purchased by Harry Winston on Oct 3, 1972