Lot 73. A 9.70 carats Brazil cushion-cut Paraiba tourmaline and diamond ring, by Tiffany & Co. Estimate USD 200,000 - USD 300,000. Price realised USD 715,500 © Christie’s Images Limited 2017.

Set with a cushion-cut Paraiba tourmaline, weighing approximately 9.70 carats, to the circular-cut diamond surround and bifurcated shoulders, ring size 6, mounted in platinum, in a Tiffany & Co. black case and blue outer box. Signed Tiffany & Co.

Accompanied by report no. CS 1081954 dated 7 March 2017 from the American Gemological Laboratories stating that the variety of this tourmaline is Paraiba. It is the opinion of the Laboratory that the origin of this tourmaline would be classified as Classic Brazil. This color variety of tourmaline is commonly the result of a relatively low temperature heating process. Clarity enhancement: None

Christie's. Magnificent Jewels, 26 April 2017, New York, Rockefeller Center