| Mineral | Orthoclase |
|---|---|
| Formula | KAlSi3O8 |
| Crystal Form | Monoclinic/Prismatic [2/m] |
| Cleavage | [001] Perfect, [010] Good |
| Color | Colorless, Greenish, Grayish yellow, White, Pink |
| Density | 2.6 g/cm3 |
| Diaphaneity | Transparent to Translucent |
| Fracture | Uneven |
| Hardness | 6.0 |
| Lustre | Vitreous |
| Streak | White |
| Dana 8 Class | 76.1.1.1 |
| Strunz Class | VIII/J.06-40 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 163 |