A pair of emerald and diamond ear pendants, by Bulgari. Photo Christie's Image Ltd 2014

Each set with a pear-shaped emerald, within a marquise and pear-shaped diamond surround, to the marquise and brilliant-cut diamond foliate surmount, mounted in platinum, 5.6 cm long. Signed Bulgari. Estimate HK$1,350,000 – HK$1,800,000 ($174,977 - $233,303)

Accompanied by report no. 73626 dated 24 March 2014 from the SSEF Swiss Gemmological Institute stating that the emeralds weighing approximately 5.20 and 4.70 carat are of Colombia origin, with no indications of clarity modification

Also accompanied by report no. CS 55442 A and B dated 17 February 2014 from the American Gemological Laboratories stating that based on available gemological information, it is the opinion of the Laboratory that the emeralds weighing 5.23 and 4.67 carat are natural, the origin of this material would be classified as Colombia, clarity enhancement: none.

Christie's. HONG KONG MAGNIFICENT JEWELS, 27 May 2014, Convention Hall - http://www.christies.com/