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Scheelite
Scheelite

Powellite
Powellite



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Scheelite
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Powellite

Scheelite and Powellite Optical Properties

Optical Properties

Luster

Vitreous, Adamantine
Greasy, Subadamantine

Pleochroism

Definite dichoric in yellow (yellow to orange-brown)
In deeply colored specimens: blue greenAnthony et al

Dispersion

0.040.03
0.005 1
👆🏻

Transparency

Translucent, Transparent
Transparent

Refractive Index

1.918-1.9361.974-1.984
1 3.25
👆🏻

Optic Character

-
-

Crystal System

tetragonal
-

Birefringence

0.016-9999
0 0.296
👆🏻

Clarity

Translucent
Transparent

Scheelite and Powellite Optic Character

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

Similar to their colors, Scheelite and Powellite 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.