Violet Blue Oval Tanzanite Gemstone 12.31 CaratsTanzanite: 12. 31cts Tanzanite Color: 30% Violet 70% Blue Tanzanite Cut: Oval Tanzanite Clarity: Flawless to VVS Tanzanite Size: 13. 1 mm wide 15. 7 mm long 8. 7 mm deep Tanzanite Quality 975 1000 One 12. 31 carats oval tanzanite, violet blue exceptional color (30% 70%), FLAWLESS TO VVS clarity, cut grade excellent, measuring 13. 1 mm wide, 15. 7 mm long, 8. 7 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are