| Apuanite | |
| Formula: | FeFeSbOS |
| Imasymbol: | Apu |
| Color: | Black |
| Mohs: | 4-5 |
| Luster: | Metallic |
| Diaphaneity: | Opaque |
| Gravity: | 5.33 |
| Density: | 5.33 g/cm3 (Measured) 5.22 g/cm3 (Calculated) |
Apuanite (IMA symbol: Apu[1]) is a rare iron antimony mineral with the chemical formula FeFeSbOS. Its type locality is the Province of Lucca, Italy.[2]