A fine 12.75 carats heart brilliant-cut diamond pendant necklace. Estimate $1,400,000 – $1,800,000. Photo Christie's Image Ltd 2015

Set with a heart brilliant-cut diamond, weighing approximately 12.75 carats, to the fine link neckchain, 16 3/4 ins., mounted in white gold

Accompanied by report no. 2171226238 dated 20 July 2015 from the GIA Gemological Institute of America stating that the diamond is D color, VS1 clarity

Christie's. IMPORTANT JEWELS, 20 October 2015, New York, Rockefeller Plaza