Violet Blue Oval Tanzanite Gemstone 6.61 CaratsOne 6. 61 carats oval tanzanite, violet blue exceptional color (mostly blue), FLAWLESS TO VVS clarity, cut grade very good, measuring 10. 2 mm wide, 13 mm long, 6. 9 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 67. 6%, table width 57. 8%. The overall quality rating of this tanzanite is 945 out of 1000. A beautiful rare blue tanzanite. Tanzanite is color enhanced by heating.