Orpiment & Realgar
| Formula | As2S3 |
| Origin | Quiruvilea Mine (Peru) |
| Description | Large yellow-green-orange aggregate of orpiment with seated deep red realgar crystals and colourless blocky baryte crystals. |
| Classification (Lapis) | Sulfides |
| Crystal System | Monoclinic |
| Hardness | 1,5 – 2,0 |
| Colour | Yellow |
| Streak | Yellow |
| Luminescence | none observed |
| Lustre | Pearly |
| Transparency (Opacity) | Transparent when fresh |
| Cleavage | perfect |
| Fracture | |
| Magnetism | no |
| Geological Setting | In hydrothermal deposits |
| Specific Gravity | 3,4 g/cm3 |
Kristallmodell
#© Mark Holtkamp
