Since 2013 – From Collectors for Collectors
| Chemische Formel | Mn2+Sn4+Ta2O8 | |
| Familie | ||
| Farbe | braun, schwarz, rot | |
| Härte | 5,5-6 | |
| Kristallsystem | monoklin | |
| Glanz | Metallglanz | |
| Form | dipyramidal, prismatisch, massig, derb | |
| Typlokalität | Australien, Kanada | |
| Weitere Fundorte | Brasilien, Maine, Connecticut, Alabama | |
| Bildung | Magmatisch, Pegmatit | |
| Paragenesen | Kassiterit, Feldspat | |
| Pseudomorphose | ||
| Toxizität |  ungiftig | |
| Strichfarbe | braun | |
| Mineralklasse | Oxide | |
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| Chemische Formel | Fe2+Fe3+4[(OH)5|(PO4)3] | |
| Familie | ||
| Farbe | schwarz, grün | |
| Härte | 3,5-4,5 | |
| Kristallsystem | orthorhombisch | |
| Glanz | Glasglanz | |
| Form | traubig, faserig | |
| Typlokalität | Virginia | |
| Weitere Fundorte | Alabama, New Jersey, New Hampshire, Brasilien, Portugal | |
| Bildung | Sedimentär | |
| Paragenesen | Strengit, Hureaulith, Phosphosiderit, Strunzit | |
| Pseudomorphose | ||
| Toxizität | ungiftig | |
| Strichfarbe | graugrün | |
| Mineralklasse | Phosphate | |
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| Chemische Formel | SnO2 | |
| Familie | ||
| Farbe | schwarz, braun, grau, grün | |
| Härte | 6-7 | |
| Kristallsystem | tetragonal | |
| Glanz | Diamantglanz;Fettglanz | |
| Form | prismatisch, dipyramidal, nadelig | |
| Typlokalität | ||
| Weitere Fundorte | Bolivien, Portugal, Australien, Tschechien, Afghanistan, Brasilien, China, Spanien, Pakistan, UK, Kalifornien, Alabama | |
| Bildung | hydrothermal | |
| Paragenesen | Glimmer, Siderit, Pyrit, Fluorit, Feldspat, Turmalin | |
| Pseudomorphose | ||
| Toxizität | ungiftig | |
| Strichfarbe | weiß | |
| Mineralklasse | Oxide | |
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