2.91 ct cushion tanzaniteDescription Measurements Custom Jewelry One 2. 91 carats square cushion tanzanite, blue violet exceptional color, 10X LOUPE CLEAN clarity, cut grade very good, measuring 8. 4 mm wide, 8. 3 mm long, 5. 7 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 68%. A notably fine daylight blue color. Tanzanites are color enhanced by heating. Love this stone? Did you know that we design custom