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0 item @ $0.00  

Columbite-(Fe)

#56013

Columbite-(Fe)

#56013
Availability
Sold
Size
8 x 6 x 4 cm - Sm Cabinet 
Formula
Fe2+Nb2O6 (RRUFF)
Locality
Etta mine, Pennington Co., South Dakota, United States
Tagged
pegmatite mineral

Large specimen for the mineral with deep, typical striations for Columbite. There are many faces, though it is not a complete crystal. It is on  some matrix which includes Albite and Quartz. It is one of the bigger specimens of Columbite you would ordinarily see on the market. The Etta mine is a very famous mine for pegmatite minerals, especially Spodumene "logs". The mine gained worldwide recognition in the 1880's for it's role in the tin mining hoax.

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

Data courtesy of Webmineral.

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