Sodalite and Andesine Optical Properties

Sodalite

Andesine

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1 Optical Properties

1.1 Luster

Greasy

Vitreous

1.2 Pleochroism

AbsentWalter Schumann

colorless.

1.3 Dispersion

0.020.70

0.007 1

1.4 Transparency

Transparent, Translucent, Opaque

Transparent, Translucent, Transparent to translucent

1.5 Refractive Index

1.478-1.4881.543-1.564

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

cubic

Triclinic

1.8 Birefringence

Not Available0.007-0.011

0 0.296

1.9 Clarity

Transparent

Sodalite and Andesine Optic Character

Sodalite and Andesine optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Sodalite and Andesine 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 Andesine 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. Andesine has Biaxial/+ character.

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Sodalite and Andesine Transparency

Similar to their colors, Sodalite and Andesine 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.