Lot 179. A Colombian emerald and diamond pendent necklace, by Harry Winston. Estimate CHF 350,000 - CHF 600,000 (USD 354,070 - USD 606,977). Photo Christie's Images Ltd 2016.

The detachable pendant set with an octagonal step-cut emerald, weighing approximately 38.02 carats, within a circular and marquise-cut diamond cluster surround, to the circular-cut emerald and diamond twin line necklace, the emerald with additional diamond-set cluster ring mounting, pendant 5.5 cm, necklace 37.0 cm, ring size 5 ¼, mounted in platinum and gold. Necklace, pendant and ring mounting with maker's mark of Jacques Timey for Harry Winston.

Accompanied by report no. 85852 dated 4 May 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 4 January 1974 and copy of a valuation dated 30 March 1983, both from Harry Winston.

Christie's. Geneva Magnificent Jewels, 15 November 2016, Geneva