Product ID: 807239198
Product Name: Tourmaline
Price : $10.74
Weight: 1.00
Jewelry Size: 6.4 x 5.7 x 3.3 Mm
Shape: Octagon
Color: Green
Clarity: SI
Luster: Good
Origin: Nigeria
Treatment: Unheated
Crystal Structure: Trigonal
Hardness: 7 - 7.5
Specific Gravity: 3.0+
Refractive Index: 1.62 - 1.68
Chemical: Na(Li,Al)3Al6(B03)3 Si6O18(OH)4