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Siderite
Siderite
☒

Fibrolite
Fibrolite
☒



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X
Siderite
X
Fibrolite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Pearly
-
0.04
Transparent, Translucent
1.633-1.875
-
Trigonal
0.242
Transparent
 
-
DistinctArthur Thomas
0.02
Transparent
1.658-1.678
-
-
-9999
Transparent