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Spinel
Spinel

Tortoiseshell
Tortoiseshell



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Spinel
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Tortoiseshell
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Absent
0.02
Transparent, Translucent, Transparent to translucent
1.73
-
Isometric
-9999
TransparentUlrich Henn and Claudio C. Milisenda
 
-
-
0.01
-
1.540-1.560
-
-
-9999
OpaqueUlrich Henn and Claudio C. Milisenda