RING In white gold, set with a cushion-shaped tanzanite weighing approximately 9.30 cts, the surround set with brilliant-cut diamonds. A diamond and 18k gold ring, set with a cushion-shaped tanzanite weighing approximately 9.30 cts. RC : Slight shock and lack of material under one claw. Partially legible hallmark. TDD: 55; US: 7 1/2 (subject to change). Gross weight: 8.7 g (18k - 750).