Hold for Charles M Blue Violet Oval Tanzanite Gemstone 6.64 CaratsHold for Charles M One 6. 64 carats oval tanzanite, blue violet exceptional (40% 60%) color, FLAWLESS TO VVS clarity, cut grade very good, measuring 9. 7 mm wide, 12. 9 mm long, 7. 3 mm deep; with very good polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 75. 3%, table width 56. 7%. The overall quality rating of this tanzanite is 965 out of 1000. Tanzanite is color enhanced by heating Customize a Ring or