Since 2013 – From Collectors for Collectors
| Chemische Formel | Mn4+O2 | |
| Familie | ||
| Farbe | grau, schwarz | |
| Härte | 3 | |
| Kristallsystem | orthorhombisch | |
| Glanz | Metallglanz | |
| Form | faserig, nadelig, blättrig | |
| Typlokalität | New Mexiko | |
| Weitere Fundorte | Griechenland, Arizona | |
| Bildung | Oxidationszone von Mangan-Lagerstätten, Dehydrierung aus Groutit | |
| Paragenesen | Pyrolusit, Groutit, Calcit | |
| Pseudomorphose | Groutit | |
| Toxizität |  ungiftig | |
| Strichfarbe | braunschwarz | |
| Mineralklasse | Oxide | |
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| Chemische Formel | MnO2 | |
| Familie | ||
| Farbe | grau, schwarz | |
| Härte | 6-6,5 | |
| Kristallsystem | tetragonal | |
| Glanz | Metallglanz | |
| Form | dendritisch, traubig, nadelig, radialstrahlig | |
| Typlokalität | ||
| Weitere Fundorte | Deutschland, Brasilien, Arizona, Portugal, Mexiko, England, Michigan, New Mexico, Tschechien, Spanien, Kanada | |
| Bildung | hydrothermal, Oxidationszone von Mangan-Lagerstätten | |
| Paragenesen | Goethit, Calcit, Hämatit, Baryt, Psilomelan, Manganit, Limonit | |
| Pseudomorphose | ||
| Toxizität | ungiftig | |
| Strichfarbe | schwarz | |
| Mineralklasse | Oxide | |
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| Chemische Formel | Mn2+Mn3+6[O8|SiO4][ | |
| Familie | ||
| Farbe | schwarz | |
| Härte | 6-6,5 | |
| Kristallsystem | tetragonal | |
| Glanz | Metallglanz | |
| Form | derb, krustig, pyramidal, Oktaeder | |
| Typlokalität | Deutschland | |
| Weitere Fundorte | Südafrika, Griechenland, Indien, Arizona | |
| Bildung | Oxidationszone von Mangan-Lagerstätten, Metamorphose | |
| Paragenesen | Calcit, Baryt, Rhodonit, Hausmannit, Pyrolusit | |
| Pseudomorphose | ||
| Toxizität | ungiftig | |
| Strichfarbe | schwarz | |
| Mineralklasse | Silikate | |
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