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Aegerine (NaFe3+Si2O6) NS2658A |
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| Crystal system | monoclinic (characterized by either a single 2-fold symmetry and/or a single plane of symmetry). |
| Habit | columnar or prismatic, striated and pointed with steep terminations |
| Cleavage | imperfect (or not a smooth or even break) |
| Fracture | uneven. |
| Hardness | 6-6.5 |
| Specific Gravity | 3.4-3.55 |
| Color | brown or green to dark green. |
| Luster | vitreous and translucent. |
| Streak | pale-brown. |
| Distinguishing features | slender crystals that can poke into the skin and its green/brown color are typical. |
| Uses | of interest to collectors and researchers. |
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