A Ceylon sapphire and diamond necklace, by Graff. Estimate $250,000 – $350,000. Photo Christie's Image Ltd 2015.

The front suspending a graduated three-row fringe of pear-shaped sapphires, enhanced with marquise and circular-cut diamonds, to the variously-cut diamond backchain, mounted in platinum, 15 1/4 ins., in a Graff leather box.Signed Graff, no. 3668

With report CS 66152 dated 13 February 2015 from the American Gemological Laboratories stating that it is the opinion of the Laboratory that the origin of the sapphires (an excess of 50% tested at random) would be classified as Ceylon (Sri Lanka). Standard Enhancement: Heat

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