| Other names: | Calamine |
| Mineral class: | Silicate |
| Composition: | Hydrated zinc silicate, Zn4Si2O7(OH)2 H2O |
| Hardness: | 4.5 - 5 |
| Color: | White, pale, green, blue |
| Cleavage: | 2 directions, rarely seen |
| Crystal form: | Radiating, globular |
| Comments: | Scratched by knife but not by penny. Usually occurs with zinc ores such as sphalerite. |