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Maghemite with Magnetite & Hematite

#RW49990

Maghemite with Magnetite & Hematite

#RW49990
Availability
Sold
Size
9 x 2.5 x 2.5 cm - Sm Cabinet 
Formula
Fe2.67O4 (RRUFF)
Locality
Thunderbird North mine, Virginia, St. Louis Co., Minnesota, United States

Drill core showing banded iron formation of the far north of Minnesota iron range.  The reddish bands are Hematite and the blackish bands of both Magnetite and Maghemite.

Maghemite

Formula
Fe2.67O4 
Crystal System
Isometric 
Crystal Habit
Massive, Massive - Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
dark brown 
Streak
brown 
Class
Isometric - Tetartoidal 
Fracture
Sub Conchoidal 
Hardness

Data courtesy of Webmineral.

Collection
Robert J. Waidler Collection
Mineralpedia
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