Important ring in white and yellow gold 750 thousandths, set with a cabochon-cut green tourmaline approx. 21.80 ct, shouldered by two lines of three calibrated green tourmalines. M. O. (French) : J. Stag head. M. 1980s. Main tourmaline size: 20.1 x 13.9 x 9.1 mm Finger: 55 (tightening ball) - Gross weight: 29.9 g