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Afghanite
Afghanite

Cryolite
Cryolite



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Afghanite
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Cryolite

Afghanite and Cryolite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Greasy, Pearly

Pleochroism

-
colorless.

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.5231.338-1.339
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
monoclinic

Birefringence

0.0060.001
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Afghanite and Cryolite Optic Character

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

Afghanite and Cryolite Transparency

Similar to their colors, Afghanite 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, Afghanite is Transparent while Afghanite is Transparent in appearance.