Violet Blue Round Brilliant Cut Tanzanite Gemstone 4.27 CaratsOne 4. 27 carats round brilliant cut tanzanite, violet blue exceptional color, FLAWLESS TO VS1 clarity, cut grade very good, measuring 9. 7 mm wide, 9. 7 mm long, 6. 6 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 68. 04%, table width 50. 5%. The overall quality rating of this tanzanite is 938 out of 1000. Crown was recut by Steve Moriarty. Tanzanite is color enhanced by heating.