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Dominant species
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Manganocolumbite
Chemical
Formula
Fe2+Nb2O6
Species
Oxides & Hydroxides
Crystal
System
Orthorhombic
Mohs
Scale
6
Specific
Gravity
5.3-7.3
Color
Black, brownish black.
Streak
blackish brown
Luster
sub-metallic
Cleavage
Distinct
Fracture
Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Crystal Habit:Massive - Granular - Common texture observed in granite and other igneous rock; Striated - Parallel lines on crystal surface or cleavage face.
Manganocolumbite9051
Manganocolumbite9051
Manganocolumbite9050
Manganocolumbite9050
Manganocolumbite9049
Manganocolumbite9049
Manganocolumbite9048
Manganocolumbite9048
Manganocolumbite9047
Manganocolumbite9047
Manganocolumbite9046
Manganocolumbite9046

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