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Cassiterite
Cassiterite

Scheelite
Scheelite



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Cassiterite
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Scheelite

Cassiterite and Scheelite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine, Greasy
Vitreous, Adamantine
1.2 Pleochroism
Pleochroic haloes have been observed. Dichroic in yellow
Definite dichoric in yellow (yellow to orange-brown)
1.3 Dispersion
0.070.04
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Translucent, Transparent
1.5 Refractive Index
1.990-2.1051.918-1.936
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
tetragonal
tetragonal
1.8 Birefringence
0.096-0.0980.016
Achroite
0 0.296
1.9 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 Translucent and Transparent while Cassiterite is Translucent and Transparent in appearance.