A 27.83 carats Ceylon sapphire and diamond ring. Estimate $300,000 - $500,000. Price Realized $845,000. Photo Christie's Image Ltd 2015

Set with a rectangular-cut sapphire, weighing approximately 27.83 carats, flanked on either side by a triangular-cut diamond, mounted in 18k gold, with French assay mark and maker's mark

With report CS 66774 dated 25 March 2015 from the American Gemological Laboratories stating that it is the opinion of the Laboratory that the origin of this sapphire would be classified as Classic Ceylon (Sri Lanka). No gemological evidence of heat

Christie's. IMPORTANT JEWELS, 16 June 2015, New York, Rockefeller Plaza