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Strontianite
Strontianite

Cryolite
Cryolite



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Strontianite
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Cryolite

Strontianite and Cryolite Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Vitreous, Greasy, Pearly

Pleochroism

-
colorless.

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.517-1.6671.338-1.339
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
monoclinic

Birefringence

-99990.001
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Strontianite and Cryolite Optic Character

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

Strontianite and Cryolite Transparency

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