Colorless and colored uncut diamonds sit beside tweezers and a... News PhotoAfrica,Botswana,Business,Color Image,Corporate Business,DeBeers,Diamond - Gemstone,Economy,Europe,Finance,Gaborone,Gemstone,Global Finance,Horizontal,Magnifying Glass,Metal,Metal Ore,Mine,Miner,Mining,Organization,Precious Gem,Sitting,South Africa,Table,TweezersPhotographer Collection: Bloomberg 2012 BloombergColorless and colored uncut diamonds sit beside tweezers and a magnifying glass at 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