Band ring in 750 thousandths yellow gold, set with a cabochon-cut opal, approx. 0.30 ct, in a setting of twenty-four modern brilliant-cut diamonds (some with tiny chips). French work from the 1980s. Opal size: 6.9 x 5.1 x 1.8 mm Total estimated diamond weight: 0.20 ct Finger size : 47.5 Gross weight : 5.1 g