Natural Purple Tanzanite Antique Cushion Gemstone 1.78 CaratsOne 1. 78 carats antique cushion tanzanite, rare natural purple color, FLAWLESS TO VVS clarity, cut grade excellent, measuring 6. 8 mm wide, 7. 2 mm long, 5. 2 mm deep; with excellent polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 76. 5%, table width 57. 3%. Natural unheated color.