Guide price: £20-40

NATURAL TANZANITE Colour Blue, Weight 8.80ct. Shape & cut Cushion, 12.78mm x 9.59mm x 6.91mm, Optic Ch Biaxial, Refractive Index 1.69-1.70, Specific Gravity 3.5, MOHs Scale 6.5-7.00, Species Zoisite, Treatments Heating