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Cryolite
Cryolite

Sunstone
Sunstone



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Cryolite
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Sunstone

Cryolite and Sunstone Optical Properties

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Optical Properties

Luster

Vitreous, Greasy, Pearly
Vitreous

Pleochroism

colorless.
Weak or absentWalter Schumann

Dispersion

0.010.01
0.005 1
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Transparency

-
Transparent, Translucent, Transparent to translucent

Refractive Index

1.338-1.3391.53-1.55
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
Triclinic

Birefringence

0.0010.007-0.010
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent to translucent

Cryolite and Sunstone Optic Character

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

Similar to their colors, Cryolite and Sunstone 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.