Guide price: £20-40

NATURAL TANZANITE Colour Blue, Weight 6.30 ct. Shape & cut Trillion, 11.98mm x 11.78mm x 6.16mm , 12.68mm, Optic Ch Biaxial, Refractive Index 1.69-1.70, Specific Gravity 3.5, MOHs Scale 6.5-7.00, Species Zoisite, Treatments Heating