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Precious Opal
Precious Opal

Pumpellyite
Pumpellyite



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Precious Opal
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Pumpellyite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.01
Transparent, Translucent
1.370-1.470
-
-
-9999
Transparent
 
-
-
0.02
-
1.674-1.764
-
monoclinic
0.014-0.016
OpaqueUlrich Henn and Claudio C. Milisenda