| Formula | CaSO4 |
| Origin | Obrigheim (Neckar), Germany |
| Description | |
| Classification (Lapis) | Sulfates |
| Crystal System | orthorhombic |
| Hardness | 3,0 – 3,5 |
| Colour | colorless to pale blue or violet if transparent; white, mauve, rose, pale brown or gray from included impurities; colorless in transmitted light |
| Streak | white |
| Luminescence | possible |
| Luster | vitreous |
| Transparency (Opacity) | transparent to translucent |
| Cleavage | perfect |
| Fracture | uneven to splintery |
| Magnetism | negative |
| Geological Setting | a major component in sedimentary evaporite deposits and in the cap rocks above salt domes, commonly formed by dehydration of gypsum; in igneous rocks |
| Specific Gravity | 2,95 g/cm3 |
