18 ct. white gold, marked. In the center the tanzanite in oval cut in prong setting approx. 5,37 ct. (approx. 12,5 x 9,4 x 5,8 mm), the ring and the framing with 52 small round brillant cut diam. in total approx. 0,46 ct. H-I.vs-P. Size 51, weight approx. 5 g.