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Diamonds in the Rough

Tuesday, 21 Aug 2012 | 12:00 AM ET

Before rough diamonds can become the sparklers seen in jewelry stores around the world, they make a stop at a sorting company like The Diamond Trading Company of Botswana (DTC), a joint venture between the government of Botswana and Debeers. With over 12,000 different classifications used, it takes both machine and human to sort through each and every carat.