Mineralienatlas - Fossilienatlas
Collectors Summary
| Chemical Formula | Al2SiO4(F,OH)2 |
| Color | farblos, blassblau, gelb, gelblichbraun, rot, orange, grün, violett |
| Streak color | weiß |
| Lustre | Glasglanz |
| Hardness (Mohs) | 8 |
| Fracture | submuschelig, uneben |
| Solubility | + H2SO4, - andere Säuren, HF, Ultraschallbad! |
| Crystal System | orthorhombisch, Pbnm |
| Morphology | kurz-oder langsäulig, derb oder strahlig |
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