An emerald and diamond ring, mounted by Cartier. Photo Christie's Image Ltd 2012

The square cut-cornered emerald claw-set to stepped baguette-cut diamond shoulders, raised on a plain hoop. Signed Mtd. Cartier. Estimate: $63,520 – $95,280. Price Realized £121,250 ($195,091).

Accompanied by a report from The Swiss Gemmological Insitute (SSEF), stating the emerald has had minor oil enhancement, origin Colombia, please refer to the department for further details

Christie's. IMPORTANT JEWELS. 12 December 2012. London, King Street - www.christies.com