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Helenite
Helenite

Precious Opal
Precious Opal



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Helenite
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Precious Opal
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.04
-
-9999
-
-
-9999
-
 
-
-
0.01
Transparent, Translucent
1.370-1.470
-
-
-9999
Transparent