Extra Siberite Tourmaline Faceting tips! Helpful information such as details, reviews, tricks, successful tips and suggestions on Siberite Tourmaline stones
Siberite Tourmaline
Color: Blue/purple
Moh's Hardness: 7-7.5
Refractive Index: 1.616-1.652
Critical Angle: 38.23°
Specific Gravity: 3.02-3.26
Cleavage: None
Fracture: Uneven, small conchoidal.
Dispersion: .017
Heat Sensitivity: Sometimes
Dichroic: Strong (many color variations)
Birefringence (double refraction): Medium (.014-.024)
Crystal structure: Hexagonal
Treatments: Generally there is no treatments with this kind of rough.
What I prefer to polishing with: Alumina oxide with a tin lap (scored).
Jeff's Comments: Cuts and polishes like any other Tourmaline, usually no problems. This material is quite rare and is seldom flawless.
Design Notes: About any Tourmaline design will work well, although I generally prefer a shallow checkerboard on darker rough.
Design Links: Signature #4 - This is good for about any rough
Easy Emerald - This is a classic and works well on poor "c" axis colored stones
Smith Bar - This is a classic and works well on poor "c" axis colored stones
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Siberite Tourmaline
Color: Blue/purple
Moh's Hardness: 7-7.5
Refractive Index: 1.616-1.652
Critical Angle: 38.23°
Specific Gravity: 3.02-3.26
Cleavage: None
Fracture: Uneven, small conchoidal.
Dispersion: .017
Heat Sensitivity: Sometimes
Dichroic: Strong (many color variations)
Birefringence (double refraction): Medium (.014-.024)
Crystal structure: Hexagonal
Treatments: Generally there is no treatments with this kind of rough.
What I prefer to polishing with: Alumina oxide with a tin lap (scored).
Jeff's Comments: Cuts and polishes like any other Tourmaline, usually no problems. This material is quite rare and is seldom flawless.
Design Notes: About any Tourmaline design will work well, although I generally prefer a shallow checkerboard on darker rough.
Design Links: - This is good for about any rough - This is a classic and works well on poor "c" axis colored stones - This is a classic and works well on poor "c" axis colored stones
