Violet Blue Oval Tanzanite Gemstone 4.64 CaratsOne 4. 64 carats oval tanzanite, violet blue exceptional (30% 70%) color, FLAWLESS TO VVS clarity, cut grade excellent, measuring 8. 6 mm wide, 11. 5 mm long, 7 mm deep; with excellent polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 81. 4%, table width 52. 3%. The overall quality rating of this tanzanite is 975 out of 1000. Tanzanite is color enhanced by heating. The ultimate sapphire blue. Customize a Ring