An impressive 22.31 carats rectangular-cut diamond ring. Estimate 500,000 – $600,000. Photo Christie's Image Ltd 2015

Set with a rectangular-cut diamond, weighing approximately 22.31 carats, flanked on either side by a tapered baguette-cut diamond, mounted in platinum

With report 2165357800 dated 15 August 2014 from the Gemological Institute of America stating that the diamond is L color, VS2 clarity, with excellent polish and excellent symmetry

Christie's. MAGNIFICENT JEWELS, 14 April 2015, New York, Rockefeller Plaza