Violet Blue Oval Tanzanite Gemstone 7.41 CaratOne 7. 41 carats oval tanzanite, violet blue exceptional color, 10X LOUPE CLEAN clarity, cut grade excellent, measuring 9. 7 mm wide, 13. 6 mm long, 7. 6 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 78%. The overall quality grade of this tanzanite is 937 out of 1000. Tanzanites are enhanced by heating. This stone has an outstanding blue color that is difficult to capture with the