Blue Violet Exceptional Oval Tanzanite Gemstone 17.76 CaratsDescription Measurements Custom Jewelry One 17. 76 carats oval tanzanite, blue violet exceptional plus color, Vs1 clarity, cut grade very good, measuring 13. 5 mm wide, 17. 3 mm long, 10. 3 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 76%, table width 60. 7 %. The overall quality grade of this tanzanite is 960 out of 1000. Beautiful blue in daylight and intense blue violet with