Blue Violet Emerald Cut Tanzanite Gemstone .86 CaratsOne . 86 carat emerald cut tanzanite, blue violet vivid color, 10X LOUPE CLEAN clarity, cut grade very good, measuring 4. 6 mm wide, 6. 7 mm long, 3. 2 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 69. 5%. The overall quality rating of this tanzanite is 843 out of 1000. Tanzanites are color enhanced by heating.