Blue Violet Round Brilliant Cut Tanzanite Gemstone 2.17 CaratsOne 2. 17 carats round brilliant cut tanzanite, blue violet vivid color, 10X LOUPE CLEAN clarity, cut grade very good, measuring 7. 6 mm wide, 7. 6 mm long, 5. 3 mm deep; with good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 69. 7%. The overall quality rating of this stone is 904 out of 1000. Tanzanites are color enhanced by heating