Lot317. An Art Deco Colombian octagonal-shaped emerald and diamond ring, Cartier. Estimate USD 50,000 - USD 70,000. Price Realised  USD 1,135,500. © Christie's Images Ltd 2016.

Bezel-set with an octagonal-shaped emerald, to the single and old-cut diamond three-row gallery and shoulders, ring size 4 3/4, mounted in platinum. Signed Cartier 

Accompanied by report no. CS 1079646 dated 31 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 insignificant clarity enhancement, traditional type

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