Indigo Blue Tourmaline 0.81 ct

Stone type: Tourmaline
Weight: 0.81 ct
Coloe: Indigo Blue
Dimension: 6.73 × 5.05 × 3.28 mm
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*