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Sodalite and Tortoiseshell Optical Properties


Tortoiseshell and Sodalite Optical Properties


Optical Properties

Luster
Greasy   
Not Available   

Pleochroism
AbsentWalter Schumann   
Not Available   

Dispersion
0.02   
21
Not Available   

Transparency
Transparent, Translucent, Opaque   
Gemmological Tables (2004)   

Refractive Index
1.478-1.488   
1.540-1.560   

Optic Character
Not Available   
Not Available   

Crystal System
cubic   
Not Available   

Birefringence
Not Available   
Not Available   

Clarity
Transparent   
OpaqueUlrich Henn and Claudio C. Milisenda   

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Sodalite and Tortoiseshell Optic Character

Sodalite and Tortoiseshell optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Sodalite and Tortoiseshell Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Sodalite and Tortoiseshell optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

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Sodalite and Tortoiseshell Transparency

Similar to their colors, Sodalite and Tortoiseshell transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Sodalite is Opaque, Translucent and Transparent while Sodalite is Opaque, Translucent and Transparent in appearance.

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