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Pyrophyllite and Vesuvianite Optical Properties


Vesuvianite and Pyrophyllite Optical Properties


Optical Properties

Luster
Pearly   
Vitreous, Resinous   

Pleochroism
NilArthur Thomas   
slight in colored varieties   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
Not Available   

Refractive Index
1.534-1.601   
1.703-1.752   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
tetragonal   

Birefringence
0.050   
0.004-0.006   

Clarity
Translucent   
Not Available   

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<< Physical Properties

Pyrophyllite and Vesuvianite Optic Character

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

Similar to their colors, Pyrophyllite and Vesuvianite 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, Pyrophyllite is Translucent while Pyrophyllite is Translucent in appearance.

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