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Hurlbutite
Hurlbutite

Bastnasite
Bastnasite



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Hurlbutite
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Bastnasite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
-
0.02
Transparent
1.595-1.604
-
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a
0.009
Transparent
 
Vitreous, Greasy, Pearly
Faint
0.02
-
1.717-1.722
-
Hexagonal
0.100
TransparentUlrich Henn and Claudio C. Milisenda