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Andalusite
Andalusite

Scheelite
Scheelite



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Andalusite
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Scheelite

Andalusite and Scheelite Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Vitreous, Adamantine

Pleochroism

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

Dispersion

0.020.04
0.005 1
👆🏻

Transparency

Transparent, Translucent
Translucent, Transparent

Refractive Index

1.627-1.6501.918-1.936
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
tetragonal

Birefringence

0.009-0.0100.016
0 0.296
👆🏻

Clarity

Transparent
Translucent

Andalusite and Scheelite Optic Character

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

Andalusite and Scheelite Transparency

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