Since 2013 – From Collectors for Collectors
| Chemische Formel | Ca(Fe2+)2Fe3+[O|OH|Si2O7] | |
| Familie | ||
| Farbe | schwarz | |
| Härte | 5,5-6 | |
| Kristallsystem | monoklin;orthorhombisch | |
| Glanz | Metallglanz | |
| Form | prismatisch, strahlig, massig | |
| Typlokalität | Italien | |
| Weitere Fundorte | Griechenland, China, Mexiko, Russland, Idaho | |
| Bildung | Metamorphose | |
| Paragenesen | Quarz, Hedenbergit, Calcit, Arsenopyrit, Rhodochrosit, Siderit, Sphalerit, Fluorit | |
| Pseudomorphose | ||
| Toxizität |  ungiftig | |
| Strichfarbe | braunschwarz | |
| Mineralklasse | Silikate | |
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| Chemische Formel | CaFe2+[Si2O6] | |
| Familie | Pyroxene | |
| Farbe | grün, braun, schwarz | |
| Härte | 5,5-6,5 | |
| Kristallsystem | monoklin | |
| Glanz | Glasglanz | |
| Form | prismatisch, nadelig, säulig | |
| Typlokalität | Schweden | |
| Weitere Fundorte | Russland, New Jersey, Arizona, Australien, Italien, Kanada, Pakistan, China | |
| Bildung | Metamorphose, Magmatisch | |
| Paragenesen | Andradit, Ilvait, Calcit, Hämatit, Titanit, Fluorit | |
| Pseudomorphose | Ilvait | |
| Toxizität | ungiftig | |
| Strichfarbe | weiß | |
| Mineralklasse | Silikate | |
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