In this undated photo provided by Christie’s Auction House in New York, a rare pink cushion-cut 9-carat diamond ring from the estate of the late copper heiress Huguette Clark is shown. The piece, ... more 
In this undated photo provided by Christie’s Auction House in New York, a rare pink cushion-cut 9-carat diamond ring from the estate of the late copper heiress Huguette Clark is shown. The piece, believed to be owned by Clark’s mother, sold for $15,762,500 at Christies’ New York Magnificent Jewels auction on Tuesday, April 17, 2012. (AP Photo/Christie’s Auction House) less 
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Associated Press | Photo By Christie’s Auction House
Tue, Apr 17, 2012 9:32 PM EDT