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Charlesite
Charlesite

Benitoite
Benitoite



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Charlesite
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Benitoite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Nearly colorless to pale golden yellow
0.03
-
1.492
-
Trigonal
-9999
-
 
Vitreous
O = colorless; E = purple
0.04
Transparent
1.757-1.804
-
Hexagonal
0.047
Transparent