A Pair of Emerald, Diamond and Natural Pearl Ear Pendants. Photo Christie's Image Ltd 2013

Each suspending a pear-shaped emerald, weighing approximately 18.98 and 16.75 carats, from a pearl to the old-mine and cushion-cut diamond surmount, each weighing approximately 2.00 carats, mounted in platinum. Estimate: $650,000 – $850,000

With reports 12020009 and 12020010 dated 06 February 2012 from the Gübelin Gem Lab stating that gemmological testing revealed characteristics consistent with those of emeralds originating from Colombia. Indications of minor clarity enhancement 

With reports 57739 A and B dated 31 October 2013 from the American Gemological Laboratories stating that it is the opinion of the Laboratory that the origin of these emeralds would be classifed as Colombia. Minor clarity enhancement, modern type 

With report 2145484890 dated 26 March 2012 from the Gemological Institute of America stating that the old-mine cut diamond, weighing approximately 2.00 carats is G color, VS1 clarity 

Christie's. MAGNIFICENT JEWELS. 10 December 2013. New York, Rockefeller Plaza -www.christies.com