On Hold Linda. Blue Violet Stepped Oval Tanzanite Gemstone 17.40 CaratsOne 17. 40 carats stepped oval tanzanite, blue violet exceptional color (45% 55%r), VS2 clarity, cut grade excellent, measuring 13. 7 mm wide, 15. 3 mm long, 11. 3 mm deep; with excellent polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 82. 5%, table width 45. 3%. The overall quality rating of this tanzanite is 967 out of 1000. Tanzanite is color enhanced by heating. Cut by Steve Moriarty. Outstanding