An Art Deco rock crystal, diamond and enamel pendant necklace, by Georges Fouquet. Photo Christie's Image Ltd 2013

Suspending a drop-shaped rock crystal pendant set with a rose-cut diamond, joined by rose-cut diamond and black enamel links to a rock crystal hoop, from the rock crystal bead neckchain, mounted in platinum, circa 1925, 25 ins., with French assay mark. With maker’s mark for Georges Fouquet. Estimate:  $10,000 – $15,000

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