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Diamond
Diamond
☒

Cordierite Iolite
Cordierite Iolite
☒



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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Adamantine
None
0.04
Transparent, Translucent, Transparent to opaque
2.417-2.419
-
cubic
-9999
Transparent
 
Vitreous
Strong trichroism: colorless to yellowish
0.02
Transparent
1.542-1.578
Biaxial/+
-
0.008-0.012
Transparent

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