A rectangular-cut light pink diamond ring. Photo Christie's Image Ltd 2014

Set with a rectangular-cut fancy light pink diamond, weighing approximately 5.91 carats, mounted in platinum and 18k rose gold. Estimate $575,000 – $675,000

With report 10731291 dated 27 March 2014 from the Gemological Institute of America stating that the diamond is fancy light pink, natural color, VS1 clarity

Christie's. IMPORTANT JEWELS, 10 June 2014, New York, Rockefeller Plaza - http://www.christies.com/