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Quartz
Quartz
☒

Tortoiseshell
Tortoiseshell
☒



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Quartz
X
Tortoiseshell
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
None
0.01
Transparent, Translucent, Transparent to translucent
1.544-1.553
-
Trigonal
0.009
Opaque
 
-
-
0.01
-
1.540-1.560
-
-
-9999
OpaqueUlrich Henn and Claudio C. Milisenda