A colored diamond and diamond pendant brooch, by Van Cleef & Arpels. Photo Christie's Image Ltd 2013

Designed as a circular-cut diamond cluster, within a marquise-cut yellow diamond surround, trimmed with marquise-cut diamonds, mounted in gold and platinum, 1973, accompanied by an unsigned circular-cut diamond neckchain, 24¼ ins. (may be worn at various lengths). Pendant brooch signed Van Cleef & Arpels, N.Y., no. 43793 (2). Estimate:  $35,000 – $55,000

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