Van Cleef & Arpels, an emerald and diamond necklace, the necklace composed of polished circular

Van Cleef & Arpels, an emerald and diamond necklace, the necklace composed of polished circular gold links, the front section pavé- and collet-set with brilliant-cut diamonds, centring on a cabochon emerald link suspending a detchable pendant collet-set with a larger cabochon emerald weighing approximately 11.00 carats, necklace length 41cm, length at front 2.9cm, signed VCA, numbered 14431, stamped CS for 'commission speciale', French assay mark for 18ct gold, French maker's mark for André Vassort