Lot 498. A magnificent diamond ring, by Leviev. Estimate $4,000,000 - $6,000,000. Price Realized 4,309,000. © Christie's Image Ltd 2013

Set with a cushion-cut diamond, weighing approximately 26.72 carats, flanked on either side by a shield-shaped diamond, mounted in platinum. Signed LEVIEV. 

With report 15800369 dated 30 October 2013 from the Gemological Institute of America stating that the diamond is D color, Internally Flawless clarity

Christie's.  MAGNIFICENT JEWELS. New York, Rockefeller Plaza. 10 December 2013