| Mineral | Gypsum |
|---|---|
| Formula | CaSO4 • 2H2O |
| Crystal Form | Monoclinic/Prismatic [2/m] |
| Cleavage | Perfect on {010}, Distinct on {100} |
| Color | Colorless, white |
| Density | 2.3 – 2.3 g/cm3 |
| Diaphaneity | Transparent, Translucent, Opaque |
| Fracture | Splintery, conchoidal |
| Hardness | 2.0 |
| Lustre | Vitreous, Sub-Vitreous, Silky, Pearly, Dull |
| Streak | White |
| Dana 8 Class | 29.6.3.1 |
| Strunz Class | 6/C.22-20 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 282 |