| Formula | CuSO4 • 5H2O |
| Origin | Planet Mine, La Paz (USA) |
| Description | Intense blue coloured cluster of chalcanthite crystals |
| Classification (Lapis) | Sulfates |
| Crystal System | triclinic |
| Hardness | 2,5 |
| Colour | Berlin blue to sky-blue, greenish blue; colorless to pale blue in transmitted ligh |
| Streak | white |
| Luminescence | blue |
| Luster | vitreous |
| Transparency (Opacity) | translucent |
| Cleavage | perfect |
| Fracture | uneven |
| Magnetism | negative |
| Geological Setting | a secondary mineral in the oxidized portions of copper sulfide deposits |
| Specific Gravity | 2,28 g/cm3 |
