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Cordierite Iolite
Cordierite Iolite
☒

Chrysocolla
Chrysocolla
☒



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Cordierite Iolite
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Chrysocolla
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Strong trichroism: colorless to yellowish
0.02
Transparent
1.542-1.578
Biaxial/+
-
0.008-0.012
Transparent
 
Vitreous, Greasy
-
0.02
Opaque
1.460-1.570
-
monoclinic
0.023-0.050
-

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