Sodalite and Hibonite Optical Properties

Sodalite

Hibonite

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1 Optical Properties

1.1 Luster

Greasy

Vitreous

1.2 Pleochroism

AbsentWalter Schumann

O = brownish gray; E = gray

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Translucent, Opaque

Handbook of mineralogy (2001)

1.5 Refractive Index

1.478-1.4881.79-1.807

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

cubic

Hexagonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

Handbook of mineralogy (2001)

Sodalite and Hibonite Optic Character

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

Similar to their colors, Sodalite and Hibonite 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.