Violet Blue Long Oval Tanzanite Gemstone 1.77 CaratsOne 1. 77 carats long oval tanzanite, violet blue vivid color, 10 X LOUPE CLEAN clarity, cut grade excellent, measuring 5. 8 mm wide, 9. 4 mm long, 4. 6 mm deep; with excellent polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 79%. The overall quality rating of this tanzanite is 931 out of 1000. Tanzanites are color enhanced by heating. Cut by Steve Moriarty.