A 15.21 carats fancy orangy brown diamond and diamond ring. Estimate $200,000 – $300,000. Photo Christie's Image Ltd 2015

Set with an oval-cut fancy orangy brown diamond, weighing approximately 15.21 carats, to the circular-cut diamond gallery and half-hoop, ring size 6 1/4, mounted in 18k rose gold and platinum

Accompanied by report no. 5161252441 dated 16 June 2014 from the GIA Gemological Institute of America stating that the diamond is fancy orangy brown, natural color, VS2 clarity 

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