Sodalite and Cordierite Optical Properties

Sodalite

Cordierite

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1 Optical Properties

1.1 Luster

Greasy

Greasy, Vitreous

1.2 Pleochroism

AbsentWalter Schumann

X = pale yellow

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Translucent, Opaque

Not Available

1.5 Refractive Index

1.478-1.488Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

cubic

Orthorhombic

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

Not Available

Sodalite and Cordierite Optic Character

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

Similar to their colors, Sodalite and Cordierite 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.