An elegant diamond ring. Photo: Christie's Images Ltd 2012

Set with a rectangular-cut diamond, weighing approximately 10.57 carats, flanked on either side by three baguette-cut diamonds, mounted in platinum. Estimate $800,000 - $1,200,000. Price Realized $938,500

With report 2155073570 dated 25 October 2012 from the Gemological Institute of America stating that the diamond is D color, VVS1 clarity 

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