| Name | Astrophyllite |
| Class | Silicates |
| Category | Mineral |
| Crystal system | Triclinic |
| Chemical composition | K₂(Na,Fe²⁺)₇Ti₂Si₈O₂₆(OH)₄ |
| Hardness (Mohs scale) | 3 to 4 |
| Transparency | Translucent to opaque |
| Geographical origin | Norway, Russia, Canada, United States, Greenland |






















































































































































































































