| Mineral | Anorthite |
|---|---|
| Formula | CaAl2Si2O8 |
| Crystal Form | Triclinic/Pinacoidal [1] |
| Cleavage | Perfect on {001}, Less so on {010}, Imperfect on {110} |
| Color | Colorless, Reddish grey,White |
| Density | 2.7 – 2.8 g/cm3 |
| Diaphaneity | Transparent to Translucent |
| Fracture | Irregular/Uneven, Conchoidal |
| Hardness | 6.0 - 6.5 |
| Lustre | Vitreous |
| Streak | White |
| Type Loc. | Monte Somma, Somma-Vesuvius Complex, Naples Prov., Campania, Italy |
| Dana 8 Class | 76.01.03.06 |
| Strunz Class | 8/J.07-70 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 320 |