Lot 276. A superb 39.90 carats Colombia no oil cushion-cut emerald and diamond ring. Estimate USD 1,500,000 - USD 2,500,000. Price Realised  USD 1,447,500. © Christie's Images Ltd 2016.

Set with a cushion-cut emerald, weighing approximately 39.90 carats, flanked on either side with a tapered baguette-cut diamond, ring size 6, mounted in platinum 

Accompanied by report no. 16105029 dated 26 October 2016 from the Gübelin Gem Lab stating that gemmological testing revealed characteristics consistent with those emeralds originating from Colombia, with no indications of oil 

With report no. CS 1079375 dated 19 October 2016 from the AGL American Gemological Laboratories stating that it is the opinion of the Laboratory that the origin of this emerald would be classified as Colombia, with no clarity enhancement

 Christie's. Magnificent Jewels, 7 December 2016, New York, Rockefeller Plaza