Paraiba Tourmaline 4.68 cts

Stone type: Paraiba Tourmaline
Weight: 3.57 cts
Color: Greenish-blue
Dimension: 10.26 x 8.67 x 7.4 mm
Shape & Cut: Cushion, Yavorskyy cut 
Certified: GIA

Treatment: Conventionally heated at low temperature
Refractive Index: 1.618-1.643
Hardness: 7-7.5
Specific Gravity: 3.1
Optical properties: Doubly refractive
Chemical formula: Complex Boron Silicate, Copper-bearing
Shipment from: Thailand
Return Policy: 3 Day Money-Back Return*