Troilite
Mineral FeS
About it
Iron sulfide found mostly in meteorites, as bronze nodules in iron meteorites and grains in stony ones. Unlike most pyrrhotite it is not magnetic. Named for Domenico Troili.
- Type
- Mineral
- Group
- Sulfide, pyrrhotite group
- Formula
- FeS
- Hardness (Mohs)
- 3.5–4
- Specific gravity
- 4.67–4.82
- Streak
- greyish black
- Lustre
- metallic
- Crystal system
- Hexagonal
- Colours
- pale greyish brown, bronze
- Transparency
- opaque
- Cleavage and fracture
- none; uneven fracture
Typical values: real specimens vary. For more, see mindat.org.