Oct 2nd, 2012
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 third-largest gem-quality diamond and the largest alluvial diamond ever discovered.
On October 3, 1972, Sierra Leone’s then-President, Siaka Stevens, announced that Harry Winston, the New York City jeweller, had purchased the Star of Sierra Leone for under $2.5 million.The stone was initially cut into an emerald shaped stone weighing 143.2 carats, but was later re-cut due to an internal flaw, eventually resulting in 17 separate finished diamonds, of which 13 were deemed to be flawless.The largest single finished stone was a 53.96 carat flawless pear-shaped diamond. Six of the diamonds cut from the original rough were later set by Harry Winston into the “Star of Sierra Leone” brooch.