| Mineral | Orpiment |
|---|---|
| Formula | As2S3 |
| Crystal Form | Monoclinic/Prismatic [2/m] |
| Cleavage | Perfect {010} imperfect {100} |
| Color | Orange-yellow to Lemon-yellow |
| Density | 3.5 – 3.5 g/cm3 |
| Diaphaneity | Transparent |
| Hardness | 1.5 - 2.0 |
| Lustre | Pearly |
| Streak | Light lemon yellow |
| Dana 8 Class | 2.11.1.1 |
| Strunz Class | II/F.02-70 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 189 |