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Sapphire
Sapphire
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Sulphur
Sulphur
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Sapphire
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Adamantine
Strong
0.02
Transparent, Translucent, Transparent to opaque
1.762-1.788
-
Trigonal
0.008-0.009
Transparent
 
-
-
0.02
TranslucentWalter Schumann
1.958-2.245
-
-
0.291
TranslucentWalter Schumann