Violet Blue Square Cushion Tanzanite Gemstone 4.45 CaratsOne 4. 45 carats square cushion tanzanite, violet blue exceptional color (15% 85%), VS clarity, cut grade good, measuring 9. 8 mm wide, 9. 8 mm long, 5. 6 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 57%, table width 64%. The overall quality rating of this tanzanite is 900 out of 1000. Tanzanite is color enhanced by heating. A beautiful sapphire blue gem with a touch of violet in