Blue Violet Square Step Cut Tanzanite Gemstone 5.03 CaratsOne 5. 03 carats square step cut tanzanite, blue violet exceptional color (40% 60%), FLAWLESS TO VVS clarity, cut grade very good, measuring 10 mm wide, 10 mm long, 5. 7 mm deep; with very good polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 57%, table width 48%. The overall quality rating of this tanzanite is 956 out to 1000. Tanzanite is color enhanced by heating. Customize a Ring or Pendant with This