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

Set with a rectangular-cut sapphire, weighing approximately 20.13 carats, to the modified square-cut diamond shoulders, mounted in 18k gold. Estimate $60,000 – $80,000

With report CS 60778 dated 5 May 2014 from the American Gemological Laboratories stating that it the opinion of the Laboratory that the origin of this sapphire would be classified as Ceylon (Sri Lanka). Standard Enhancement: Heat 

Christie's. IMPORTANT JEWELS,10 June 2014, New York, Rockefeller Plaza - http://www.christies.com/