Blue Violet Round Tanzanite Gemstone .97 CaratsOne . 97 carat round brilliant cut tanzanite, blue violet vivid color, VVS clarity, cut grade good, measuring 6 mm wide, 6 mm long, 4. 1 mm deep; with good polish and good symmetry. The proportions of the tanzanite are as follows: total depth 68. 3%. Tanzanite is color enhanced by heating. The overall quality rating of this tanzanite is 860 out of 100. Customize a Ring or Pendant with This Gemstone? Did you know that we design custom Tanzanite