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Sillimanite
Sillimanite
☒

Aragonite
Aragonite
☒



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Sillimanite
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Aragonite
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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, Resinous
StrongArthur Thomas
0.17
Transparent, Translucent
1.525-1.686
-
Orthorhombic
0.155
Transparent

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Aragonite Vs Starlite
Aragonite
Strontium Titanate
Aragonite Vs Strontium Titanate

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