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Cassiterite
Cassiterite

Scheelite
Scheelite



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Cassiterite
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Scheelite

Cassiterite and Scheelite Optical Properties

Optical Properties

Luster

Adamantine, Greasy
Vitreous, Adamantine

Pleochroism

Pleochroic haloes have been observed. Dichroic in yellow
Definite dichoric in yellow (yellow to orange-brown)

Dispersion

0.070.04
0.005 1
👆🏻

Transparency

Transparent, Translucent
Translucent, Transparent

Refractive Index

1.990-2.1051.918-1.936
1 3.25
👆🏻

Optic Character

-
-

Crystal System

tetragonal
tetragonal

Birefringence

0.096-0.0980.016
0 0.296
👆🏻

Clarity

Transparent
Translucent

Cassiterite and Scheelite Optic Character

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

Cassiterite and Scheelite Transparency

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