14k White Gold Emerald Tanzanite and Diamond Ring 3.51 CaratsOne 14 karat white gold ring set with a 3. 51 carats emerald cut tanzanite, blue violet exceptional (40% 60%) color, FLAWLESS TO VVS clarity, cut grade very good, measuring 8 mm wide, 9. 9 mm long, 6 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 68. 4%, table width 46. 8%. The overall quality rating of this tanzanite is 950 out of 1000. Tanzanite is color enhanced by heating.