A cushion-cut sapphire ring. Photo Christie's Image Ltd 2014

Set with a cushion-cut sapphire, weighing approximately 6.11 carats, mounted in platinum. Estimate $70,000 – $100,000

With report CS 58692 dated 16 January 2014 from the American Gemological Laboratories stating that it is the opinion of the Laboratory that the origin of this material would be classified as Burma (Myanmar). No gemological evidence of heat

With report 6157466583 dated 22 May 2013 from the Gemological Institute of America that the geographic origin of this sapphire is Burma (Myanmar). No indications of heating

Christie's. MAGNIFICENT JEWELS, 16 April 2014, New York, Rockefeller Plaza - www.christies.com