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Sodalite and Purpurite Optical Properties


Purpurite and Sodalite Optical Properties


Optical Properties

Luster
Greasy   
Not Available   

Pleochroism
AbsentWalter Schumann   
StrongArthur Thomas   

Dispersion
0.02   
21
Not Available   

Transparency
Transparent, Translucent, Opaque   
TranslucentWalter Schumann, Gemstones of the world (2001) More from other references   

Refractive Index
1.478-1.488   
1.85-1.92   

Optic Character
Not Available   
Not Available   

Crystal System
cubic   
Orthorhombic   

Birefringence
Not Available   
0.070   

Clarity
Transparent   
TranslucentWalter Schumann   

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Sodalite and Purpurite Optic Character

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

Similar to their colors, Sodalite and Purpurite 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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