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Cordierite Iolite
Cordierite Iolite
☒

Jasper
Jasper
☒



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Cordierite Iolite
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Jasper
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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
-
0.01
Opaque
1.540
-
Trigonal
-9999
OpaqueHerve Nicolas Lazzarelli

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