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Axinite
Axinite
☒

Bertrandite
Bertrandite
☒



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Axinite
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Bertrandite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Strong
0.02
-
1.656-1.704
Biaxial/+
Triclinic
0.009-0.012
TransparentUlrich Henn and Claudio C. Milisenda
 
Vitreous
none.
0.01
TransparentAnthony et al
1.583-1.614
-
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21
-9999
TransparentAnthony et al