Violet Blue Square Cushion Tanzanite Gemstone 6.18 CaratsOne 6. 18 carats square cushion tanzanite, violet blue exceptional color (925) (20 80), FLAWLESS TO VVS clarity, cut grade excellent, measuring 10 mm wide, 10. 3 mm long, 7. 7 mm deep; with excellent polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 77%, table width 59%. The overall quality rating of this tanzanite is 942 out of 1000. Tanzanite is color enhanced by heating. Customize a Ring or Pendant with