Product ID: 807239793
Product Name: Tourmaline
Price : $33.98
Weight: 0.68
Jewelry Size: 7.4 x 4 x 2.3 Mm
Shape: Octagon
Color: Blue Indicolite
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