Sodalite and Dallasite Optical Properties

Sodalite

Dallasite

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1 Optical Properties

1.1 Luster

Greasy

Not Available

1.2 Pleochroism

AbsentWalter Schumann

Not Available

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Translucent, Opaque

Not Available

1.5 Refractive Index

1.478-1.4881.540

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

cubic

Not Available

1.8 Birefringence

Not Available0.008-0.010

0 0.296

1.9 Clarity

Transparent

Not Available

Sodalite and Dallasite Optic Character

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

Similar to their colors, Sodalite and Dallasite 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.