| Mineral | Acanthite |
|---|---|
| Formula | Ag2S |
| Crystal Form | Monoclinic/Prismatic [2/m] |
| Cleavage | None |
| Color | Dark grey, black |
| Density | 7.2 – 7.4 g/cm3 |
| Diaphaneity | Opaque |
| Fracture | Sub-conchoidal |
| Hardness | 2.0 - 2.5 |
| Lustre | Metallic |
| Streak | Dark grey |
| Type Loc. | Jáchymov, Jáchymov Dist., Krušné Hory Mtns., Karlovy Vary Rgn., Bohemia, Czech Republic |
| Dana 8 Class | 2.4.1.1 |
| Strunz Class | 2/B.05-10 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 217 |