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Gedrite
Gedrite

Cryolite
Cryolite



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Gedrite
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Cryolite

Gedrite and Cryolite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Greasy, Pearly

Pleochroism

Weak to moderate
colorless.

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.625-1.7181.338-1.339
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
monoclinic

Birefringence

-99990.001
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Gedrite and Cryolite Optic Character

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

Gedrite and Cryolite Transparency

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