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Cavansite
Cavansite

Siderite
Siderite



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Cavansite
X
Siderite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Pearly
Visible: X=Z= colorless Y= blue
0.04
-
1.542
-
Orthorhombic
0.009
-
 
Pearly
-
0.04
Transparent, Translucent
1.633-1.875
-
Trigonal
0.242
Transparent