A rectangular-cut emerald and diamond ring. Photo Christie's Image Ltd 2014.

Set with a rectangular-cut emerald, weighing approximately 9.23 carats, to the baguette-cut diamond scrolling surround, enhanced with circular-cut diamonds, to the bifurcated shoulders, mounted in platinum. Estimate $30,000 – $50,000

With report CS 59316 dated 21 February 2014 from the American Gemological Laboratories, stating that it is the opinion of the Laboratory that the origin of this emerald would be classifed as Colombia. Minor clarity enhancement, traditional type 

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