A sapphire and diamond ring. Photo Christie's Image Ltd 2013

Set with a cushion-cut sapphire, weighing approximately 22.30 carats, flanked on either side by a bullet-cut diamond, mounted in platinum. Estimate:  $40,000 – $60,000

With report 12075001 dated 23 July 2012 from Gübelin Gem Lab stating that gemmological testing revealed characteristics consistent with those of sapphires originating from Sri Lanka (Ceylon). No indications of heating 

Christie's. NEW YORK MAGNIFICENT JEWELS AND THE PRINCIE DIAMOND. 16 April 2013. New York, Rockefeller Plaza.