Platinum Emerald Cut Tanzanite and Diamond Ring 3.14 Carats Designed by Christopher MichaelOne platinum ring by Christopher Michael set with a 3. 14 carats emerald cut tanzanite, blue violet vivid color, FLAWLESS TO VVS clarity, cut grade excellent, measuring 5. 4 mm wide, 14. 6 mm long, 4. 2 mm deep; with excellent polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 77. 77%, table width 33. 33%. The overall quality rating of this tanzanite is 942 out of 1000. Tanzanite is color enhanced by heating.