Blue Violet Square Cushion Cut Tanzanite Set In 10kt ringMounting like 4tz 1939 "X" style in 10k WG included in price. Estimated ship date is March 14 or 15th. One 1. 91 carats square cushion tanzanite, blue violet vivid color, 10X LOUPE CLEAN clarity, cut grade very good, measuring 6. 8 mm wide, 6. 9 mm long, 4. 8 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 70. 6%. The overall quality rating of this tanzanite is 902 out of 1000.