Bi Color Tourmaline 4.19 Ct. Octagon Shape 19.7 x 7.5 Mm. Natural Gem Unheated
Price: $778.42
Product ID: 807224374
Product Name: Tourmaline
Price : $778.42
Weight: 4.19
Jewelry Size: 19.7 x 7.5 x 5.8 Mm
Shape: Octagon
Color: Bi Color
Clarity: VSI
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
