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Tantalite
Tantalite
☒

Poudretteite
Poudretteite
☒



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Tantalite
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Poudretteite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Resinous
-
0.03
TransparentWalter Schumann
2.190-2.457
-
Orthorhombic
0.083
TransparentWalter Schumann
 
Vitreous
Colorless
0.02
-
1.511-1.532
-
Hexagonal
0.021
TransparentUlrich Henn and Claudio C. Milisenda

Compare Brown Gemstones

Brown Gemstones

Pyrrhotite
Pyrrhotite
Vesuvianite
Vesuvianite
Vlasovite
Vlasovite
Poudretteite
Petrified Wood
Poudretteite Vs Petrified Wood
Poudretteite
Chromite
Poudretteite Vs Chromite
Poudretteite
Radiolarite
Poudretteite Vs Radiolarite

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