Ferro-Hornblende
| Formula | Ca2[(Fe 2+;Mg)4Al](Si7Al)O22(OH)2 |
| Origin | |
| Description | |
| Classification (Lapis) | Amphiboles |
| Crystal System | monoclinic |
| Hardness | 5,0-6,0 |
| Colour | Green, greenish brown |
| Streak | |
| Luminescence | |
| Luster | vitreous |
| Transparency (Opacity) | semitransparent |
| Cleavage | perfect |
| Fracture | |
| Magnetism | negative |
| Geological Setting | From granites, granodiorites, and metabasalts; common in amphibolites and schists. As reaction rims on ferroan hedenbergite |
| Specific Gravity | 3,12 g/cm3 |
