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White Opal
White Opal

Siderite
Siderite



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White Opal
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Siderite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.01
Translucent
1.37-1.52
-
-
-9999
Translucent
 
Pearly
-
0.04
Transparent, Translucent
1.633-1.875
-
Trigonal
0.242
Transparent