A colored diamond ring. Photo Christie's Image Ltd 2012

Set with a circular-cut fancy deep brown-yellow diamond, weighing approximately 11.97 carats, within a circular-cut diamond surround, mounted in gold and platinum. Estimate $70,000 - $90,000. Price Realized $170,500

With report 2155022057 dated 2 October 2012 from the Gemological Institute of America stating that the diamond is fancy deep brown-yellow, natural color, VS2 clarity 

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