Cubanite
Mineral CuFe2S3
About it
Brassy bronze copper-iron sulfide that is strongly magnetic, usually as thin lamellae in chalcopyrite. Named for Cuba, where it was first found; present in the Sudbury and Norilsk ores.
- Type
- Mineral
- Group
- Sulfide
- Formula
- CuFe2S3
- Hardness (Mohs)
- 3.5
- Specific gravity
- 4.03–4.18
- Streak
- black
- Lustre
- metallic
- Crystal system
- Orthorhombic
- Colours
- brass yellow, bronze yellow
- Transparency
- opaque
- Cleavage and fracture
- none; parting, conchoidal fracture
- Magnetic
- Strongly
Typical values: real specimens vary. For more, see mindat.org.