4.13 Carats Round TanzaniteOne 4. 13 carats round brilliant cut tanzanite, blue violet vivid color, 10 X LOUPE CLEAN clarity, cut grade very good, measuring 9. 7 mm wide, 9. 8 mm long, 6. 3 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 64. 9%. Tanzanites are 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