Violet Blue Tanzanite Gemstone .78 CaratsOne . 78 carat round brilliant cut tanzanite, violet blue intense color, VVS clarity, cut grade good, measuring 5. 6 mm wide, 5. 6 mm long, 4. 4 mm deep; with good polish and good symmetry. The proportions of the tanzanite are as follows: total depth 78. 5%. Tanzanite is color enhanced by heating. Customize a Ring or Pendant with This Gemstone? Did you know that we design custom Tanzanite jewelry? We would love to help you design the perfect piece of