Violet Blue Emerald Cut Tanzanite Gemstone 2.17 CaratsOne 2. 17 carats emerald cut tanzanite, violet blue exceptional (10 90) color, VS1 clarity, cut grade very good, measuring 6. 3 mm wide, 8. 2 mm long, 4. 7 mm deep; with good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 74. 6%, table width 40%. The overall quality rating of this tanzanite is 948 out of 1000. Tanzanite is color enhanced by heating. Tanzanite with Sapphire Blue Color 2. 17 Carat.