1.66 carat antique cushion tanzaniteOne 1. 66 carats antique cushion tanzanite, blue violet exceptional color, FLAWLESS TO VVS clarity, cut grade very good, measuring 6. 5 mm wide, 7. 8 mm long, 5 mm deep; with excellent polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 76. 9%, table width 53. 8%. The overall quality rating of this tanzanite is 944 out of 1000. Tanzanite is color enhanced by heating. Customize a Ring or Pendant with This