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Umbalite
Umbalite
☒

Pumpellyite
Pumpellyite
☒



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Umbalite
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Pumpellyite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.02
TransparentGemdat.org
1.730-1.820
-
-
-9999
TransparentGemdat.org
 
-
-
0.02
-
1.674-1.764
-
monoclinic
0.014-0.016
OpaqueUlrich Henn and Claudio C. Milisenda

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