Important ring in white gold, diamonds and tanzanite

MATERIAL: white gold, diamonds and violet-blue tanzanite WEIGHT: large ring made with oval tanzanite mounted with four claws fully embellished, laterally, on the base and on the ring with brilliant-cut diamonds, bears the mark 750 MEASUREMENTS: ring 13 WEIGHT: tanzanite ct 18.50, diamonds ct 1.0, color G/H, VS purity, accompanied by certification C.Dunaire Num. CDC1601024 dated 05.01.2016, gr 13.1