Diamond buyer Elliot Tannenbaum, from the Leo Schachter Diamond Group, holds a bag of uncut diamonds at a sightholders week at De Beers offices in central London

Reuters
Diamond buyer Elliot Tannenbaum, from the Leo Schachter Diamond Group, holds a bag of uncut diamonds at a sightholders week at De Beers offices in central London
Diamond buyer Elliot Tannenbaum, from the Leo Schachter Diamond Group, holds a bag of uncut diamonds at a sightholders week at De Beers offices in central London August 29, 2013. REUTERS/Olivia Harris
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