Ring in pink gold 750 thousandths and platinum 850 thousandths, set in its center with an emerald-cut emerald approx. 0.45 ct (small shock under a claw) in a surround of twelve old-cut brilliant-cut diamonds. Late 19th century. Emerald size: 5.5 x 5.1 x 2.6 mm Total estimated diamond weight: 0.55 ct Finger size : 49 Gross weight : 3.7 g