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Mineralpedia Details for Jacobsite

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Jacobsite

Jacobsite

Formula
Mn2+Fe3+2O4 
Crystal System
Isometric 
Crystal Habit
Disseminated, Massive - Granular 
Cleavage
None, None, None 
Luster
Sub Metallic 
Color
iron black, black 
Streak
reddish black 
Class
Isometric - Hexoctahedral 
Fracture
Conchoidal 
Hardness
5.5-6 
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Jacobsite from Långban, Filipstad, Värmland, Sweden

Jacobsite
            from Långban, Filipstad, Värmland, Sweden

Black crystal grains to 1mm of Jacobsite.

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