Violet Blue Emerald Cut Tanzanite Gemstone 4.13 CaratsOne 4. 13 carats emerald cut tanzanite, violet blue exceptional (40% 60%) color, FLAWLESS TO VVS clarity, cut grade very good, measuring 8. 2 mm wide, 10. 1 mm long, 5. 7 mm deep; with good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 69. 5%, table width 51. 2%. The overall quality rating of this tanzanite is 953 out of 1000. Tanzanite is color enhanced by heating.