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Columbite-(Fe)

#56018
SOLD
Columbite-(Fe) from Etta mine, Pennington Co., South Dakota, United States - 56018
Columbite-(Fe) from Etta mine, Pennington Co., South Dakota, United States - 56018

Columbite-(Fe)

#56018
Availability
Sold
Size
5.5 x 5.5 x 1.2 cm - Sm Cabinet 
Formula
Fe2+Nb2O6 (RRUFF)
Locality
Etta mine, Pennington Co., South Dakota, United States
Tagged
pegmatite mineral

Thick tabular, heavily striated crystal of black Columbite. Faces on front and back, but not the sides.

Columbite-(Fe)

Formula
Fe2+Nb2O6 
Crystal System
Orthorhombic 
Crystal Habit
Massive - Granular, Striated 
Cleavage
Distinct, None, None 
Luster
Sub Metallic 
Color
black, brownish black 
Streak
blackish brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness
6 

Data courtesy of Webmineral.

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