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Sodalite and Nepheline Optical Properties


Nepheline and Sodalite Optical Properties


Optical Properties

Luster
Greasy   
Vitreous, Greasy   

Pleochroism
AbsentWalter Schumann   
Not Available   

Dispersion
0.02   
21
Not Available   

Transparency
Transparent, Translucent, Opaque   
Transparent, Translucent   

Refractive Index
1.478-1.488   
1.529-1.547   

Optic Character
Not Available   
Not Available   

Crystal System
cubic   
Hexagonal   

Birefringence
Not Available   
0.003-0.004   

Clarity
Transparent   
Transparent   

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Sodalite and Nepheline Optic Character

Sodalite and Nepheline optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Sodalite and Nepheline 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 Nepheline 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 Nepheline Transparency

Similar to their colors, Sodalite and Nepheline 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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