Blue Violet Trilliant Tanzanite Gemstone 2.50 CaratsOne 2. 50 carats trilliant cut tanzanite, blue violet vivid color, FLAWLESS TO VVS clarity, cut grade very good, measuring 8. 5 mm wide, 8. 5 mm long, 5. 9 mm deep; with good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 69. 4%, table width 52. 9%. Tanzanite is color enhanced by heating. The overall quality raating of this tanzanite is 908 out of 1000.