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Apophyllite
Apophyllite
☒

Hurlbutite
Hurlbutite
☒



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Apophyllite
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Hurlbutite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Pearly
Dichroic (colorless)
0.01
Transparent, Translucent
1.530-1.543
Uniaxial/-
tetragonal
0.000-0.003
Transparent
 
Vitreous
-
0.02
Transparent
1.595-1.604
-
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a
0.009
Transparent

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