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Carnelian
Carnelian

Helenite
Helenite



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Carnelian
X
Helenite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
-
0.01
Translucent, Transparent to nearly opaque
1.535-1.539
-
Trigonal
0.003-0.009
Translucent
 
-
-
0.04
-
-9999
-
-
-9999
-