| Mineral | Uraninite |
|---|---|
| Formula | UO2 |
| Crystal Form | Isometric/Hexoctahedral [4/m 3 2/m] |
| Cleavage | Good |
| Color | Black, Brownish black, Gray, Greenish gray |
| Density | 10.6 – 10.9 g/cm3 |
| Diaphaneity | Opaque |
| Fracture | Irregular/Uneven, Conchoidal |
| Hardness | 5.0 - 6.0 |
| Lustre | Greasy, Sub-metallic, Dull |
| Streak | Brown-black, Gray, Olive-green |
| Dana 8 Class | 5.1.1.1 |
| Strunz Class | 4/D.31-60 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 245 |