Guide price: £20-40

NATURAL TANZANITE Colour Blue, Weight 6.10ct. Shape & cut Pear, 13.91mm x 8.63mm x 6.04mm, Optic Ch Biaxial, Refractive Index 1.69-1.70, Specific Gravity 3.5, MOHs Scale 6.5-7.00, Species Zoisite, Treatments Heating