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| Star of Sierra Leone ： ウィキペディア英語版 |
The 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 discovered.(Internet Stones: Star of Sierra Leone )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.(Third Biggest Diamond Bought by Dealer Here ), NY Times, October 3, 1972The stone was initially cut into an emerald shaped stone weighing but was later re-cut due to an internal flaw,(Koidu Holding: Famous Diamonds of Sierra Leone ) eventually resulting in 17 separate finished diamonds, of which 13 were deemed to be flawless. The largest single finished gem was a flawless pear-shaped diamond of . Six of the diamonds cut from the original rough were later set by Harry Winston into the "Star of Sierra Leone" brooch.(About Harry Winston: Legendary Gems )A rare characteristic of the stone is its perfect chemical purity: it is ranked as a type IIa diamond, a category which includes less than 1% of all diamonds.(The Star of Sierra Leone by Famous diamonds ). 24hgold.com. Retrieved on 2011-03-28.==References==
The 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 discovered.〔(Internet Stones: Star of Sierra Leone )〕
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.〔(Third Biggest Diamond Bought by Dealer Here ), NY Times, October 3, 1972〕
The stone was initially cut into an emerald shaped stone weighing but was later re-cut due to an internal flaw,〔(Koidu Holding: Famous Diamonds of Sierra Leone )〕 eventually resulting in 17 separate finished diamonds, of which 13 were deemed to be flawless. The largest single finished gem was a flawless pear-shaped diamond of . Six of the diamonds cut from the original rough were later set by Harry Winston into the "Star of Sierra Leone" brooch.〔(About Harry Winston: Legendary Gems )〕
A rare characteristic of the stone is its perfect chemical purity: it is ranked as a type IIa diamond, a category which includes less than 1% of all diamonds.〔(The Star of Sierra Leone by Famous diamonds ). 24hgold.com. Retrieved on 2011-03-28.〕
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「The 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 discovered.(Internet Stones: Star of Sierra Leone )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.(Third Biggest Diamond Bought by Dealer Here ), NY Times, October 3, 1972The stone was initially cut into an emerald shaped stone weighing but was later re-cut due to an internal flaw,(Koidu Holding: Famous Diamonds of Sierra Leone ) eventually resulting in 17 separate finished diamonds, of which 13 were deemed to be flawless. The largest single finished gem was a flawless pear-shaped diamond of . Six of the diamonds cut from the original rough were later set by Harry Winston into the "Star of Sierra Leone" brooch.(About Harry Winston: Legendary Gems )A rare characteristic of the stone is its perfect chemical purity: it is ranked as a type IIa diamond, a category which includes less than 1% of all diamonds.(The Star of Sierra Leone by Famous diamonds ). 24hgold.com. Retrieved on 2011-03-28.==References==」の詳細全文を読む
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