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Sillimanite
Sillimanite
☒

Weloganite
Weloganite
☒



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Sillimanite
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Weloganite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Subadamantine, Silky
Colourless to pale brown to yellow
0.02
Transparent, Translucent
1.653-1.685
-
Orthorhombic
0.020-0.022
Transparent
 
Vitreous
-
0.03
-
1.558
-
Triclinic
0.082
-

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Vivianite
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Wardite
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Weloganite Vs Starlite
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Weloganite Vs Strontium Titanate

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