A diamond ring. Photo: Christie's Images Ltd 2012

Set with a rectangular-cut diamond, weighing approximately 6.40 carats, the shoulders set with circular-cut diamonds, mounted in platinum. Estimate $350,000 - $450,000. Price Realized $482,500

With report 11368592 dated 1 March 2012 from the Gemological Institute of America stating that the diamond is D color, flawless clarity

Christie's. Magnificent Jewels . 10 December 2012 New York, Rockefeller Plaza