Kot 204. A Colombian emerald weighing approximately 23.34 carats, and diamond ring. Estimate USD 240,000 - USD 600,000. © Christie’s Images Limited 2018.

Set with a square cushion-cut emerald, weighing approximately 23.34 carats, flanked on either side by a pair of trapezoid-cut diamonds and square-cut diamond half-hoop, enhanced by a circular-cut diamond gallery, ring size 6 1/2, mounted in platinum.

Accompanied by report no. 1086801 dated 17 January 2018 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 minor clarity enhancement, traditional type.

Christie's. Magnificent Jewels, New York, 17 April 2018