Pink gold necklace 750 thousandths, geometrical pendant set with sixty old-cut diamonds (one missing), holding a cabochon opal of approx. 20 ct, forçat-link chain, lobster clasp. 1940s element, mounted as a necklace with a modern opal. Estimated total diamond weight: 2.20 ct Opal size: 19.4 - 19.6 x 10.5 mm Pendant size: 5 x 2.2 cm - Length: 38.5 and 42.5 cm Gross weight: 18.6 g