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Columbite-(Fe)

#56326
SOLD
Columbite-(Fe) from Etta mine, Pennington Co., South Dakota, United States - 56326
Columbite-(Fe) from Etta mine, Pennington Co., South Dakota, United States - 56326

Columbite-(Fe)

#56326
Availability
Sold
Size
5 x 2.5 x 1.5 cm - Miniature 
Formula
Fe2+Nb2O6 (RRUFF)
Locality
Etta mine, Pennington Co., South Dakota, United States
Tagged
pegmatite mineral

A partial section of a large Columbite crystal with characteristic striations. There are three crystal faces.

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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