Green Tourmaline 0.64 ct
Stone type:Tourmaline
Weight: 0.64 ct
Color: Green
Dimension: 3.90 x 5.43 x 3.45 mm
Shape & Cut: Octagonal, 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*