A pair of emerald and diamond ear pendants, by Harry Winston. Photo Christie's Image Ltd 2013

Each suspending a detachable pendant set with a pear-shaped emerald, weighing approximately 8.93 and 7.93 carats, within a pear and marquise-cut diamond surround, to the pear and marquise-cut diamond cluster surmount, mounted in platinum and gold. Surmounts with maker's mark for Harry Winston. Estimate $350,000 – $500,000

With report 13025344 dated 26 February 2013 from Gübelin Gem Lab stating that gemmological testing revealed characteristics consistent with those of emeralds originating from Colombia. Indications of minor clarity enhancement. Tested insofar as mounting permits

Christie's. NEW YORK MAGNIFICENT JEWELS AND THE PRINCIE DIAMOND. 16 April 2013. New York, Rockefeller Plaza.