An unmounted rectangular-cut diamond. Photo Christie's Image Ltd 2012

Weighing approximately 6.25 carats. Estimate $150,000 - $200,000. Price Realized $230,500

With report 16812059 dated 24 January 2008 from the Gemological Institute of America stating that the diamond is E color, VS1 clarity 

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