Indigo Blue Tourmaline 1.40 cts

Stone type: Tourmaline
Weight: 1.40 cts
Color: Indigo Blue
Dimension: 6.23 × 5.02 × 4.66 cm
Shape & Cut: Cushion, Yavorskyy cut

Treatment: Unheated and Untreated (No Indications Observed)
Refractive Index: 1.618-1.643
Hardness: 7-7.5
Specific Gravity: 3.1
Optical properties: Doubly refractive
Chemical formula: Complex Boron Silicate
Shipment from: Thailand
Return Policy: 3 Day Money-Back Return*