Lot 150. A rare 11.25 carats unmounted square cushion mixed-cut Colombian, Muzo emerald. Estimate CHF 450,000 - CHF 550,000 (USD 455,233 - USD 556,395). Photo Christie's Image Ltd 2016.

The square cushion mixed-cut emerald, weighing approximately 11.25 carats, in green leather fitted case

Accompanied by report no. 87396 dated 31 August 2016 from the SSEF Swiss Gemmological Institute stating that the origin of the emerald is Colombia, with no indications of clarity modification.

Report no. CS1077216 dated 25 July 2016 from the AGL American Gemological Laboratories stating that the origin of the emerald is Colombia, with insignificant clarity enhancement.

Certificate of origin and traceability dated 21 June 2016 from Muzo.

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