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Beudantite
Beudantite

Colemanite
Colemanite



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Beudantite
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Colemanite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Resinous
visible
0.03
-
1.957
-
Trigonal
0.014
-
 
Vitreous
-
0.02
Transparent
1.584-1.615
-
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a
0.028-0.030
Transparent