Blue Violet Oval Tanzanite Gemstone 2.84 CaratsOne 2. 84 carats oval tanzanite, blue violet exceptional color (35% 65%) color, FLAWLESS TO VVS clarity, cut grade very good, measuring 7. 9 mm wide, 9 mm long, 5. 9 mm deep; with very good polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 74. 7%, table width 46. 8%. The overall quality rating of this tanzanite is 944 out of 1000. Tanzanite is color enhanced by heating. This gem has excellent brilliance.