Since 2013 – From Collectors for Collectors
| Chemische Formel | (Mg,Fe2+)7[OH|Si4O11]2 | |
| Familie | ||
| Farbe | grau, weiß, braun | |
| Härte | 5,5-6 | |
| Kristallsystem | orthorhombisch | |
| Glanz | Glasglanz | |
| Form | faserig, radialstrahlig, prismatisch | |
| Typlokalität | Norwegen | |
| Weitere Fundorte | Tschechien, North Carolina, Finnland, Italien, Pennsylvania, Colorado, Connecticut | |
| Bildung | Metamorphose, Pegmatite | |
| Paragenesen | Glimmer, Chlorit, Cordierit, Amphibole, Rutil, Granat | |
| Pseudomorphose | ||
| Toxizität |  ungiftig | |
| Strichfarbe | grauweiß | |
| Mineralklasse | Silikate | |
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