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Howlite
Howlite
☒

Hanksite
Hanksite
☒



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Howlite
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Hanksite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
-
0.01
-
1.583-1.608
-
monoclinic
0.019
-
 
Vitreous
-
0.03
-
1.481
-
Hexagonal
0.020
-