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Viridine
Viridine
☒

Cordierite Iolite
Cordierite Iolite
☒



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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.02
Transparent, Translucent
1.629-1.660
-
-
0.007-0.013
Transparent
 
Vitreous
Strong trichroism: colorless to yellowish
0.02
Transparent
1.542-1.578
Biaxial/+
-
0.008-0.012
Transparent

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