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Afghanite and Cassiterite Optical Properties


Cassiterite and Afghanite Optical Properties


Optical Properties

Luster
Vitreous   
Adamantine, Greasy   

Pleochroism
Not Available   
Pleochroic haloes have been observed. Dichroic in yellow   

Dispersion
Not Available   
0.07   
6

Transparency
Transparent, Gemstones (2009)   
Transparent, Translucent   

Refractive Index
1.523   
1.990-2.105   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
tetragonal   

Birefringence
0.006   
0.096-0.098   

Clarity
Transparent   
Transparent   

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Afghanite and Cassiterite Optic Character

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

Similar to their colors, Afghanite and Cassiterite 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, Afghanite is Gemstones (2009) and Transparent while Afghanite is Gemstones (2009) and Transparent in appearance.

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