BULGARI SIGNET RING In yellow gold, set with a beautiful octagonal faceted emerald weighing 6.74 cts, punctuated by a series of troïda diamonds on the shoulder. Circa 1970. Signed. A diamond and 18k gold ring set with an octagonal shaped emerald weighing 6.74 cts, by Bulgari. Circa 1970. Certificate C. Dunaigre attesting: origin Colombia (Colombia), insignificant impregnation (insignificant). RC : Dimensions of the stone: 12.60 x 10.70 x 6.40 mm approx. TDD: 54-55, US: 7 (changeable). Gross weight: 12.4 g (18k - 750).