Hauerite
Mineral MnS2
About it
Dark reddish brown octahedrons with a reddish brown streak, much lighter in the hand than other pyrite-group minerals. Best known from the sulphur mines around Raddusa, Sicily.
- Type
- Mineral
- Group
- Sulfide, pyrite group
- Formula
- MnS2
- Hardness (Mohs)
- 4
- Specific gravity
- 3.4–3.5
- Streak
- reddish brown
- Lustre
- adamantine (diamond-like), submetallic
- Crystal system
- Isometric (cubic)
- Colours
- reddish brown, brownish black
- Transparency
- translucent, opaque
- Cleavage and fracture
- perfect cubic; uneven fracture
Typical values: real specimens vary. For more, see mindat.org.