Blue Violet Stepped Square Cushion Tanzanite Gemstone 20.10 CaratsOne 20. 10 carats stepped square cushion tanzanite, blue violet intense (10% 90%) color, SI1 clarity, cut grade excellent, measuring 14. 2 mm wide, 15. 5 mm long, 12. 3 mm deep; with excellent polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 86. 6%, table width 38. 7%. Tanzanite is color enhanced by heating. Light but very beautiful. Customize a Ring or Pendant with This Gemstone? Did you know that we design