Mineralpedia Details for 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
- WebMineral
- View Jacobsite
- Mindat
- View Jacobsite
Jacobsite from Långban, Filipstad, Värmland, Sweden
Black crystal grains to 1mm of Jacobsite.
Click thumbnail images for larger view.
Jacobsite from N'Chwaning mines, Kuruman, Northern Cape prov., South Africa
Shiny black crystals to 5mm.
Click thumbnail images for larger view.
