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Wulfenite
Wulfenite

Cryolite
Cryolite



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Wulfenite
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Cryolite

Wulfenite and Cryolite Optical Properties

Optical Properties

Luster

Adamantine, Resinous
Vitreous, Greasy, Pearly

Pleochroism

Weak
colorless.

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

2.280-2.4051.338-1.339
1 3.25
👆🏻

Optic Character

-
-

Crystal System

tetragonal
monoclinic

Birefringence

0.1220.001
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Wulfenite and Cryolite Optic Character

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

Wulfenite and Cryolite Transparency

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