Pink gold 750 thousandths dome ring set with a round-cut peridot in a surround of twenty half-cut diamonds set on 850 thousandths platinum. French work, 1950s. Peridot size: 13.1 x 13.3 x 7.9 mm Total estimated diamond weight: 0.60 ct Finger: 55 - Gross weight: 17.4 g