Platinum, emerald and diamond ring. Photo courtesy Sotheby's 

Centered by a round emerald weighing 12.08 carats, framed by marquise and pear-shaped diamonds weighing approximately 2.75 carats, size 5¾, fitted with inner sizing band. Lot. Vendu 293,000 USD 

Accompanied by AGL report no. CS 57421 stating that the emerald is of Colombian origin, clarity enhancement: minor, type: traditional. 

Sotheby's. Magnificent Jewels. New York | 11 Dec 2013 - www.sothebys.com