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Siderite
Siderite
☒

Mellite
Mellite
☒



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Siderite
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Mellite
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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
 
Vitreous
Weak: yellowish brown yellowAnthony et al
0.01
-
1.509-1.541
-
-
0.030
TransparentUlrich Henn and Claudio C. Milisenda