Since 2013 – From Collectors for Collectors
| Chemische Formel | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O | |
| Familie | ||
| Farbe | grau, schwarz, braun | |
| Härte | 1,5 | |
| Kristallsystem | monoklin | |
| Glanz | Fettglanz;Metallglanz;Wachsglanz | |
| Form | massig, faserig, nadelig, strahlig, dendritisch | |
| Typlokalität | Japan | |
| Weitere Fundorte | Österreich, Kasachstan, Südafrika, New Jersey, Maryland | |
| Bildung | Sekundär, Metasomatose, Sedimentär | |
| Paragenesen | Romanechit, Calcit, Aragonit | |
| Pseudomorphose | ||
| Toxizität |  ungiftig | |
| Strichfarbe | braun | |
| Mineralklasse | Oxide | |
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| Chemische Formel | (Ba,H2O)2(Mn+4,Mn+3)5O10 | |
| Familie | ||
| Farbe | grau, schwarz | |
| Härte | 5-6 | |
| Kristallsystem | monoklin | |
| Glanz | Metallglanz | |
| Form | traubig, massig | |
| Typlokalität | Frankreich | |
| Weitere Fundorte | Spanien, Argentinien, Deutschland, Griechenland, Mexiko, Arizona, New Mexico, Vermont, Michigan, Kalifornien | |
| Bildung | Oxidationszone von Mangan-Lagerstätten | |
| Paragenesen | Rhodochrosit, Baryt, Hollandit, Birnessit | |
| Pseudomorphose | Gips | |
| Toxizität | ungiftig | |
| Strichfarbe | braunschwarz | |
| Mineralklasse | Oxide | |
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