Emerald and diamond necklace 18ct yellow gold link chain with tongue clasp and safety catch, featuring one emerald cut emerald, in a stepped bezel set frame and a bezel set round brilliant cut diamond, both suspended from a stepped bezel set oval cut emerald, flanked by two bezel set marquise diamonds on either side, total emerald weight approximately 3.40ct, stamped '750 Sb' with French assay mark