Rough

Rough diamonds during their sorting process at the Botswana Diamond Valuing Company in Gaborone in a 2004 photo. REUTERS/Juda Ngwenya

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A diamond encrusted golf ball on display prior to the Moravia Silesia Open golf tournament in Celadna, Czechoslovakia, August 1, 2009. REUTERS/Petr Josek

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A model wears a diamond necklace by Cartier, estimated at £200,000 - 250,000 ($412,777 - 515,923), at Bonhams auctioneers in London, November 29, 2007. REUTERS/Stephen Hird

An

An aerial view of environmental damage caused by illegal gold and diamond mining at Canaima National Park in southern Bolivar State, Venezuela, June 17, 2010. REUTERS/Carlos Garcia Rawlins

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A laborer working at a diamond mine near Kpetewama, Sierra Leone, May 15, 2000. REUTERS/Dylan Martinez

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A saleswoman displays a 26.62 carat diamond at a shopping center in south China's Guangxi province November 27, 2006. REUTERS/China Daily

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A miner works underground in a Petra Diamonds diamond mine in Cullinan, outside Pretoria, South Africa, January 22, 2009. REUTERS/Siphiwe Sibeko

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A model displays a rare 603 carat white diamond known as the Lesotho Promise is displayed in Antwerp, October 9, 2006. REUTERS/Francois Lenoir

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An aerial view of an open pit mine is seen at the Diavik diamond mine, south of the Arctic Circle in Canada's Northwest Territories, February 13, 2008. REUTERS/Cameron French

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A view of $2 million dollar shoes, made out of Kwait diamonds and designed by Stuart Weitzman, worn by singer Alison Krauss as she arrives for the 76th Academy Awards in Hollywood, February 29, 2004. REUTERS/Mike Blake

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A Jack Russell terrier models a hand-strung necklace with genuine natural diamonds and 18 carat white gold at the Platinum dog boutique in Milan, December 23, 2005. REUTERS/File

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A Christie's jewellery department employee displays a heart-shaped D flawless diamond weighing 37.01 carats during a preview at Hotel des Bergues in Geneva, November 12, 2006. REUTERS/Denis Balibouse

Actress

Actress Nicole Kidman wears a L'Wren Scott diamond necklace at the 80th annual Academy Awards in Hollywood, February 24, 2008. REUTERS/Lucas Jackson

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A very fine enamel and diamond cocktail watch made by Cartier in 1924 is pictured during a preview at Sotheby's auction house in Geneva, May 7, 2008. REUTERS/Denis Balibouse

Mustapha

Mustapha Kamara washes muddy gravel in the hope of finding diamonds in Sierra Leone's eastern town of Koidu, January 22, 2008. REUTERS/Katrina Manson

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A model poses with a platinum handbag studded with 2,182 diamonds totalling 208 carats during a fashion show by jewellery maker Ginza Tanaka in Tokyo, June 14, 2007. REUTERS/Michael Caronna

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A model from Christie's in Geneva presents a Spanish Ducal diamond crown to be auctioned, November 6, 2007. REUTERS/Robert Pratta

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A woman eyes an 83 carat diamond in Sydney, December 12, 2000. REUTERS/Mark Baker