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Obsidian
Obsidian
☒

Alunite
Alunite
☒



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Obsidian
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Alunite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
-
0.01
Transparent, Translucent
1.450-1.550
-
-
-9999
Transparent
 
Vitreous, Pearly
-
0.02
-
1.572
-
Trigonal
0.020
-

Compare Gems for Sagittarius

Gems for Sagittarius

Tanzanite
Tanzanite
Topaz
Topaz
Turquoise
Turquoise
Alunite
Quartz
Alunite Vs Quartz
Alunite
Ruby
Alunite Vs Ruby
Alunite
Smoky Quartz
Alunite Vs Smoky Quartz

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