An Unmounted Oval-Cut Colored Diamond. Photo: Christie's Images Ltd

Weighing approximately 68.35 carats. Estimate $2,200,000 - $3,200,000

With report 5111487337 dated 30 August 2012 from the Gemological Institute of America stating that the modified oval-cut diamond is fancy intense yellow, natural color, internally flawless clarity, with excellent polish and excellent symmetry. 

Christie's. Magnificent Jewels. 16 October 2012. New York, Rockefeller Plaza