Bob BTanzanite to be set in 14k white and rose gold ring with larger diamonds in halo and shank. Size 6 1 4, price is for ring only, tanzanite was already purchased. One 5. 28 carats square cushion tanzanite, blue violet exceptional (45% 55%) color, FLAWLESS TO VVS clarity, cut grade excellent, measuring 10. 2 mm wide, 10. 3 mm long, 6. 5 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 63.