| Mineral | Thorianite |
|---|---|
| Formula | ThO2 |
| Crystal Form | Isometric/Hexoctahedral [4/m 3 2/m] |
| Cleavage | Poor on {001} |
| Color | Black, brownish black, dark gray, dark reddish brown |
| Density | 9.7 – 9.8 g/cm3 |
| Diaphaneity | Opaque |
| Fracture | Irregular/Uneven, Sub-Conchoidal |
| Hardness | 6.5 - 7.0 |
| Lustre | Resinous, Sub-Metallic |
| Streak | Gray, grey-green to black |
| Type Loc. | Balangoda, Ratnapura Dist., Sabaragamuwa Prov., Sri Lanka |
| Dana 8 Class | 5.1.1.2 |
| Strunz Class | 4.DL.05 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 526 |