A ring set with 'The Vivid Pink', a 5.00 carat cushion-shaped Fancy Vivid Pink Potentially Flawless diamond, the largest such diamond to ever be offered for sale, is displayed at a preview by auction house Christie's, in Hong Kong September 21, 2009. The diamond is estimated to be worth between $5 and $7 million.
REUTERS/Bobby Yip (CHINA SOCIETY)