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Scheelite
Scheelite

Alunite
Alunite



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Scheelite
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Alunite

Scheelite and Alunite Optical Properties

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Optical Properties

Luster

Vitreous, Adamantine
Vitreous, Pearly

Pleochroism

Definite dichoric in yellow (yellow to orange-brown)
-

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

Translucent, Transparent
-

Refractive Index

1.918-1.9361.572
1 3.25
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Optic Character

-
-

Crystal System

tetragonal
Trigonal

Birefringence

0.0160.020
0 0.296
👆🏻

Clarity

Translucent
-

Scheelite and Alunite Optic Character

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

Scheelite and Alunite Transparency

Similar to their colors, Scheelite and Alunite 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, Scheelite is Translucent and Transparent while Scheelite is Translucent and Transparent in appearance.