| Mineral | Gonnardite |
|---|---|
| Formula | Na2Ca[Al2Si3O10]2 • 7(H2O) |
| Crystal Form | Tetragonal/Scalenohedral [4 2m] |
| Cleavage | [???] Perfect |
| Color | White |
| Density | 2.3 g/cm3 |
| Diaphaneity | Transparent to Translucent |
| Hardness | 4.0 - 5.0 |
| Lustre | Vitreous |
| Streak | White |
| Dana 8 Class | 77.1.5.7 |
| Strunz Class | VIII/J.21-40 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 135 |