Product ID: 807216337
Product Name: Tourmaline
Price : $189.99
Weight: 2.73
Jewelry Size: 8.2 x 7.2 x 5.2 Mm
Shape: Octagon
Color: Bi Color
Clarity: IF
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