A Colored Diamond Ring, by Graff. Photo: Christie's Images Ltd 2012

Set with a modified cushion-cut fancy intense yellow diamond, weighing approximately 43.49 carats, flanked on either side by a trillion-cut diamond, mounted in gold and platinum, in a Graff navy leather box. Signed Graff. Estimate $1,000,000 - $1,500,000

With report 13810010 dated 14 February 2012 from the Gemological Institute of America stating that the diamond is fancy intense yellow, natural color, VS1 clarity 

Christie's. Magnificent Jewels, 17 April 2012, New York, Rockefeller Plaza