Violet Blue Oval Tanzanite Gemstone 4.81 CaratsOne 4. 81 carats oval tanzanite, violet blue exceptional (30% 70%) color, FLAWLESS TO VVS clarity, cut grade good, measuring 9. 1 mm wide, 11. 7 mm long, 6. 3 mm deep; with good polish and good symmetry. The proportions of the tanzanite are as follows: total depth 69. 2%, table width 60. 4%. The overall quality rating of thi tanzanite is 900 out of 1000. Tanzanite is color enhanced by heating.