A diamond necklace, by Buccellati. Photo Christie's Image Ltd 2013

Suspending an old European, single and rose-cut diamond pierced plaque, to the neckchain set with a series of old European-cut diamonds, each within a sculpted silver-topped 18k gold surround, mounted in silver-topped 18k gold, circa 1925, 19 ins., in a brown Buccellati fitted case, central oval-shaped plaque may be worn as a brooch Signed Buccellati. Estimate $60,000 – $80,000

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