An important colored diamond and diamond pendant necklace, by Tiffany & Co. Photo Christie's Image Ltd 2014

Suspending a modified cushion-cut fancy vivid yellow diamond, weighing approximately 20.34 carats, within a circular-cut diamond surround, to the neckchain, designed as a line of modified cushion-cut diamonds, each within a circular-cut diamond surround, spaced by bezel-set circular-cut diamonds, mounted in platinum and gold, 17½ ins. Signed Tiffany & Co., no. 24905632. Estimate $1,000,000 – $1,500,000

With report 14867692 dated 11 August 2008 from the Gemological Institute of America stating that the diamond is fancy vivid yellow, natural color, VVS2 clarity

Christie's. MAGNIFICENT JEWELS, 16 April 2014, New York, Rockefeller Plaza - www.christies.com