Lot 150. A 13.64 carats Colombian emerald and diamond ring, by Harry Winston. Estimate CHF150,000 – CHF250,000 ($155,372 - $258,954). Photo Christie's Image Ltd 2016.

Set with an octagonal step-cut emerald, weighing approximately 13.64 carats, between triangular-cut diamond shoulders, ring size 6, mounted in platinum and gold, in blue leather Harry Winston case. Unsigned

Accompanied by report no. 84067 dated 9 February 2016 from the SSEF Swiss Gemmological Institute stating that the origin of the emerald is Colombia, with minor amount of oil.

Further accompanied by copy of an invoice dated 15 November 1990 from Harry Winston.

Christie's. GENEVA MAGNIFICENT JEWELS, 18 May 2016, Geneva