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

Set with a cushion-cut sapphire, weighing approximately 8.80 carats, to the French-cut diamond half-hoop, mounted in platinum. Estimate $70,000 – $100,000

With report CS 57284 dated 18 October 2013 from the American Gemological Laboratories stating that the origin of this sapphire would be classified as Ceylon (Sri Lanka). Standard Enhacement: Heat

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