An emerald and diamond ring. Photo Christie's Image Ltd 2014

Set with a cut-cornered rectangular-cut emerald, weighing approximately 7.41 carats, to the brilliant-cut and shield-shaped diamond surround and shoulders, ring size 5 with ring sizer. Estimate CHF50,000 – CHF80,000 ($57,027 - $91,243)

Accompanied by report no. 72257 dated 15 January 2014 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/