| Mineral | Hardystonite |
|---|---|
| Formula | Ca2Zn(Si2O7) |
| Crystal Form | Tetragonal/Scalenohedral [4 2m] |
| Cleavage | Distinct/Good |
| Color | Light brownish white, pale greyish-white, whitish, very pale pinkish |
| Density | 3.4 g/cm3 |
| Diaphaneity | Opaque |
| Fracture | Brittle |
| Hardness | 3.0 - 4.0 |
| Lustre | Adamantine, Resinous, Dull |
| Streak | White |
| Dana 8 Class | 55.4.2.2 |
| Strunz Class | 8/C.02-40 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 237 |