Lot 2022. An impressive 7.87 carats Colombian emerald and diamond ring. Estimate HKD 2,200,000 - HKD 3,000,000 (US$280,000-380,000). © Christie's Images Ltd 2017

Centering upon an oval-shaped emerald, weighing approximately 7.87 carats, within an oval-shaped diamond surround and vari-cut diamond gallery, to the circular-cut diamond three quarter-hoop, mounted in gold, ring size 5 

Accompanied by report no. CS 68944 dated 28 October 2015 from the AGL American Gemological Laboratories stating that the emerald is of Colombia origin, with no clarity enhancement

Report no. 15105304 dated 28 October 2015 from the Gübelin GemLab stating that the emerald is of Colombia origin, with no indications of clarity enhancement 

Report no. 80110 dated 7 May 2015 from the SSEF Swiss Gemmological Institute stating that the emerald is of Colombia origin, with no indications of clarity modification