An emerald and diamond ring, by Van Cleef & Arpels. Photo Christie's Image Ltd 2014

Set with a pear-shaped emerald in a brilliant-cut diamond surround, ring size 4, with French assay marks for platinum and gold. Signed and with maker's mark for Van Cleef & Arpels, no. 277 and 309 (partially illegible). Estimate CHF60,000 – CHF80,000 ($68,432 - $91,243)

Accompanied by report no. 66909 dated 25 February 2013 from the SSEF Swiss Gemmological Institute stating that the emerald is of Colombian origin, with indications of minor amount of oil

Christie's. GENEVA MAGNIFICENT JEWELS. 14 May 2014, Geneva -http://www.christies.com/