Product ID: 807248686
Product Name: Tourmaline
Price: $4.76
Weight: 0.76 CT.
Size: 17.6 x 3.9 x 2.6 Mm.
Shape: Octagon
Color: Green
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