Tourmaline 0.87 ct

Stone type: Tourmaline 
Weight: 0.87 ct
Dimension: 6.39 x 5.28 x 3.89 mm
Color: Green
Shape & Cut: Oval, 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*