| Mineral | Pentagonite |
|---|---|
| Formula | Ca(VO)Si4O10 • 4(H2O) |
| Crystal Form | Orthorhombic/Pyramidal [mm2] |
| Cleavage | [010] Good |
| Color | Greenish blue |
| Density | 2.3 g/cm3 |
| Diaphaneity | Transparent |
| Fracture | Brittle |
| Hardness | 3.0 - 4.0 |
| Lustre | Vitreous |
| Streak | Bluish white |
| Type Loc. | Owyhee Dam, Lake Owyhee State Park, Malheur Co., OR, USA |
| Dana 8 Class | 74.3.7.2 |
| Strunz Class | VIII/H.36-20s |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 26 |