Violet Blue Square Cushion Cut Tanzanite Gemstone 4.67 CaratsOne 4. 67 carats square cushion tanzanite, violet blue exceptional color, 10X LOUPE CLEAN clarity, cut grade very good, measuring 9. 5 mm wide, 9. 5 mm long, 6. 4 mm deep; with excellent polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 67. 3%, table width 55. 8%. The overall quality rating of this tanzanite is 935 out of 1000. Tanzanites are color enhanced by heating.