Product ID: 807226816
Product Name: Tourmaline
Price : $776.57
Weight: 4.18
Jewelry Size: 9.7 x 7.5 x 6.1 Mm
Shape: Octagon
Color: Bi Color
Clarity: VVS
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