76-carat diamond nets a record $21.5M

This Oct. 25, 2010, photo, shows an employee of Sotheby's auction house holding a 24.78 carat fancy intense pink diamond mounted as a ring, that was last seen on the market some 60-years-ago according to the house, ahead of an auction in central London. In November 2010, a rare pink diamond smashed the world record for a jewel at auction, selling for more than $46 million to a well-known gem dealer. London jeweler Laurence Graff paid $46,158,674 for the diamond, which he immediately named "The Graff Pink."

Credit: AP Photo/Lefteris Pitarakis