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Cryolite
Cryolite

Sapphire
Sapphire



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Cryolite
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Sapphire

Cryolite and Sapphire Optical Properties

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Optical Properties

Luster

Vitreous, Greasy, Pearly
Vitreous, Adamantine

Pleochroism

colorless.
Strong

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

-
Transparent, Translucent, Transparent to opaque

Refractive Index

1.338-1.3391.762-1.788
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
Trigonal

Birefringence

0.0010.008-0.009
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Cryolite and Sapphire Optic Character

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

Similar to their colors, Cryolite and Sapphire 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.