14K White Gold Tanzanite with Diamond Halo Ring 5.25 CaratsOn Hold One 5. 25 carats oval tanzanite, exceptional color, SI2 clarity, cut grade excellent, measuring 9. 9 mm wide, 11. 7 mm long, 7 mm deep; with excellent polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 70. 7%, table width 37%. The overall quality rating of this tanzanite is 723 out of 1000. Tanzanite was cut by Steve Moriarty. This quality rating number is low due to the Si2 clarity. The imperfection