| Mineral | Realgar |
|---|---|
| Formula | As4S4 |
| Crystal Form | Monoclinic/Prismatic [2/m] |
| Cleavage | Good on {010}, less good on {100}, {101}, {120}, {110} |
| Color | Dark red to Orange-red |
| Density | 3.6 – 3.6 g/cm3 |
| Diaphaneity | Transparent |
| Hardness | 1.5 - 2.0 |
| Lustre | Resinous, Greasy |
| Streak | Orange-red to Red |
| Dana 8 Class | 2.8.21.1 |
| Strunz Class | II/F.02-30 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 188 |