| Mineral | Thorite |
|---|---|
| Formula | (Th,U)SiO4 |
| Crystal Form | Tetragonal/Ditetragonal-Dipyramidal [4/m 2/m 2/m] |
| Cleavage | Distinct on {110} |
| Color | Yellow-orange, brownish yellow, brownish black, black |
| Density | 6.6 – 7.2 g/cm3 |
| Diaphaneity | Nearly opaque |
| Fracture | Conchoidal |
| Hardness | 4.5 - 5.0 |
| Lustre | Vitreous to resinous or greasy |
| Streak | Light orange to dark brown |
| Dana 8 Class | 51.5.2.3 |
| Strunz Class | 8/A.09-30 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 301 |