A 15.08 carats fancy deep brown-yellow diamond ring. Estimate $120,000 – $150,000. Photo Christie's Image Ltd 2015

Set with a pear brilliant-cut fancy deep brown-yellow diamond, weighing approximately 15.08 carats, ring size 6 1/4, mounted in 18k rose gold

Accompanied by report no. 6157575279 dated 29 July 2013, from the GIA Gemological Institute of America stating that the diamond is fancy deep brown-yellow, natural color, SI1 clarity 

Christie's. IMPORTANT JEWELS, 20 October 2015, New York, Rockefeller Plaza