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Cryolite
Cryolite

Elbaite
Elbaite



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Cryolite
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Elbaite

Cryolite and Elbaite Optical Properties

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Optical Properties

Luster

Vitreous, Greasy, Pearly
Vitreous

Pleochroism

colorless.
Pale green

Dispersion

0.010.02
0.005 1
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Transparency

-
Transparent

Refractive Index

1.338-1.3391.614-1.666
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
Trigonal

Birefringence

0.0010.014-0.032
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Cryolite and Elbaite Optic Character

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

Cryolite and Elbaite Transparency

Similar to their colors, Cryolite and Elbaite 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, Cryolite is while Cryolite is in appearance.