14k White Gold Antique Cushion Tanzanite and Diamond Ring 3.61 CaratsOne 14 karat white gold ring set with a 3. 61 carats antique cushion tanzanite, blue violet exceptional color, flawless to VVS clarity, cut grade very good, measuring 7. 9 mm wide, 9. 7 mm long, 5. 6 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 70. 8%, table width 62%. The overall quality grade of this tanzanite is 921 out of 1000. Tanzanites are color enhanced by heating.