An uncut diamond is selected from a collection of colorless and colored diamonds on a sorting table at DTC Botswana, a unit of De Beers, in Gaborone, Botswana, on Thursday, Oct. 25, 2012.De Beers, the biggest diamond producer by revenue, is moving the sorting and trading of rough stones to Botswana from London to secure access to the world's largest supplier of diamonds by value and challenge Antwerp's dominance as the world's biggest trading hub for rough diamonds. Photographer: Chris Ratcliffe/Bloomberg via Getty Images
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