Yellow gold ring 750 thousandths, set with an oval-cut sapphire approx. 1.70 ct (treated, small chips), highlighted with four calibrated diamonds. Late 20th century. Sapphire size: 7.6 x 6.2 x 4.9 mm Total estimated diamond weight: 0.40 ct Finger size : 50.5 Gross weight : 5,9 g