Glaucodot
Mineral (Co,Fe)AsS
Take care.
- Contains arsenic: Wash your hands after handling it, don't make dust, and never heat it.
About it
Tin-white cobalt-iron sulfarsenide that looks like arsenopyrite, as prisms in cobalt ores. Known from Håkansboda, Sweden, and from Chile, where it was first described.
- Type
- Mineral
- Group
- Sulfarsenide, arsenopyrite group
- Formula
- (Co,Fe)AsS
- Hardness (Mohs)
- 5
- Specific gravity
- 5.9–6.1
- Streak
- black
- Lustre
- metallic
- Crystal system
- Orthorhombic
- Colours
- greyish tin white, reddish silver white
- Transparency
- opaque
- Cleavage and fracture
- perfect in one direction; uneven fracture
Typical values: real specimens vary. For more, see mindat.org.