Blue Violet Square Cushion Tanzanite Gemstone 7.54 CaratsOne 7. 54 carats square cushion tanzanite, blue violet exceptional color, FLAWLESS TO VS1 clarity, cut grade excellent, measuring 10 mm wide, 10 mm long, 9. 3 mm deep; with excellent polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 93%, table width 58%. The overall quality rating of this tanzanite is 952 out of 1000. Tanzanite is color enhanced by heating.