Argyrodite
Mineral Ag8GeS6
About it
Steel grey silver-germanium sulfide, often as octahedron-like crystals. The element germanium was discovered in it in 1886, in ore from the Himmelsfürst mine at Freiberg, Germany.
- Type
- Mineral
- Group
- Sulfide, argyrodite group
- Formula
- Ag8GeS6
- Hardness (Mohs)
- 2.5
- Specific gravity
- 6.1–6.3
- Streak
- greyish black
- Lustre
- metallic
- Crystal system
- Orthorhombic
- Colours
- steel grey, black, reddish tint
- Transparency
- opaque
- Cleavage and fracture
- none; conchoidal fracture
Typical values: real specimens vary. For more, see mindat.org.