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Colemanite
Colemanite

Verdelite
Verdelite



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Colemanite
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Verdelite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
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
 
-
Strong: dark green yellow
0.02
Transparent, Translucent
1.614-1.666
-
-
0.014-0.040
Transparent