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

Set with a cushion-cut ruby, weighing approximately 7.45 carats, flanked on either side by a triangular-cut diamond, trimmed with circular-cut diamonds, to the circular-cut diamond gallery and shoulders, mounted in white and yellow gold. Estimate $100,000 – $150,000

With report CS 60619 dated 21 April 2014 from the American Gemological Laboratories stating that it is the opinion of the Laboratory that the origin of this ruby would be classified as Burma (Myanmar). Heat enhancement: None

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