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

Set with a pear-shaped diamond, weighing approximately 16.94 carats, the bifurcated circular-cut diamond shoulders set with pear-shaped diamond accents, mounted in platinum. Estimate $380,000 - $550,000. Price Realized $602,500

With report 2145721431 dated 10 September 2012 from the Gemological Institute of America stating that the diamond is J color, VS2 clarity, with excellent polish and excellent symmetry 

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