Violet Blue Round Brilliant Tanzanite Gemstone 2.57 CaratsTanzanite: 2. 57cts Tanzanite Color: 25% Violet 75% Blue Tanzanite Cut: Round Brilliant Tanzantie Clarity: VS1 Tanzanite Size: 8 mm wide, 8 mm long, 6 mm deep Tanzanite Quality: 917 1000 One 2. 57 carats round brilliant cut tanzanite, violet blue vivid (25% 75%) more blue color, VS1 clarity, cut grade good to very good, measuring 8 mm wide, 8 mm long, 6 mm deep; with good polish and very good symmetry. The overrall quality rating of this tanzanite is