Sodalite and Austinite Optical Properties

Sodalite

Austinite

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Optical Properties

Luster

Greasy

Subadamantine, Silky

Pleochroism

Dispersion

0.020.03

0.005 1

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Transparency

Transparent, Translucent, Opaque

Refractive Index

1.478-1.4881.759

1 3.25

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Optic Character

Crystal System

cubic

Orthorhombic

Birefringence

-99990.024

0 0.296

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Clarity

Transparent

Sodalite and Austinite Optic Character

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

Similar to their colors, Sodalite and Austinite 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 Transparent, Translucent and Opaque while Sodalite is Transparent, Translucent and Opaque in appearance.