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Cassiterite and Pyrophyllite Optical Properties


Pyrophyllite and Cassiterite Optical Properties


Optical Properties

Luster
Adamantine, Greasy   
Pearly   

Pleochroism
Pleochroic haloes have been observed. Dichroic in yellow   
NilArthur Thomas   

Dispersion
0.07   
6
Not Available   

Transparency
Transparent, Translucent   
Translucent   

Refractive Index
1.990-2.105   
1.534-1.601   

Optic Character
Not Available   
Not Available   

Crystal System
tetragonal   
Not Available   

Birefringence
0.096-0.098   
0.050   

Clarity
Transparent   
Translucent   

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Cassiterite and Pyrophyllite Optic Character

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

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Cassiterite and Pyrophyllite Transparency

Similar to their colors, Cassiterite and Pyrophyllite 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.

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