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Brucite
Brucite
☒

Tantalite
Tantalite
☒



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Brucite
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Tantalite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Pearly
-
0.03
TransparentMichael O’Donoghue
1.56-1.60
-
Trigonal
0.010-0.020
TransparentMichael O’Donoghue
 
Resinous
-
0.03
TransparentWalter Schumann
2.190-2.457
-
Orthorhombic
0.083
TransparentWalter Schumann

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Blue Gemstones

Covellite
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Cyprine of Berzelius
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Dravite
Tantalite
Ceylonite
Tantalite Vs Ceylonite
Tantalite
Chrome-Chalcedony
Tantalite Vs Chrome-Chalcedony
Tantalite
Chrome Tourmaline
Tantalite Vs Chrome Tourmaline

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