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Tortoiseshell
Tortoiseshell
☒

Bustamite
Bustamite
☒



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Tortoiseshell
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Bustamite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.01
-
1.540-1.560
-
-
-9999
OpaqueUlrich Henn and Claudio C. Milisenda
 
Vitreous
Weak
0.02
Transparent, Translucent
1.662-1.707
-
Triclinic
0.013-0.015
Transparent

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Blue Gemstones

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Yttrium Aluminium Garnet
Fancy Diamond
Fancy Diamond
Garnet Malaia
Garnet Malaia
Bustamite
Violane
Bustamite Vs Violane
Bustamite
Vivianite
Bustamite Vs Vivianite
Bustamite
Wardite
Bustamite Vs Wardite

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