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0 item @ $0.00  

Columbite-(Fe) to Tantalite-(Fe)

#50290

Columbite-(Fe) to Tantalite-(Fe)

#50290
Availability
Sold
Size
9.5 x 8 x 6.5 cm - Cabinet 
Formula
Fe2+Nb2O6 (RRUFF)
Locality
Ingersoll mine, Pennington Co., South Dakota, United States
Tagged
ore mineral , pegmatite mineral

Large cabinet with black, bladed "Columbite-Tantalite" to 4.5cm in white cleavelandite matrix.

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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