An emerald and diamond necklace, by Harry Winston. Photo Christie's Image Ltd 2013

Designed as a graduated double row of rectangular-cut emeralds, extending a pear and circular-cut diamond fringe, joined by circular and pear-shaped diamond clusters to the circular-cut diamond double row backchain, mounted in platinum, 1955, 14 ins. With maker's mark for Harry Winston. Estimate $800,000 – $ 1,200,000

With report CS 53270 dated 29 January 2013 from the American Gemological Laboratories stating that it is the opinion of the Laboratory that the origin of the emeralds would be classified as Colombia. Clarity Enhancement: Faint 

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