Since 2013 – From Collectors for Collectors
| Chemische Formel | (Y,Ce,Nd)2Fe2+Be2O2(SiO4)2 | |
| Familie | ||
| Farbe | schwarz, braun | |
| Härte | 6,5-7 | |
| Kristallsystem | monoklin | |
| Glanz | Fettglanz;Glasglanz | |
| Form | massig, prismatisch | |
| Typlokalität | Schweden | |
| Weitere Fundorte | Norwegen, Texas, Colorado, Finnland, Pakistan, Tadschikistan | |
| Bildung | Metamorphose | |
| Paragenesen | Feldspat, Anatas, Fluorit, Glimmer, Allanit | |
| Pseudomorphose | ||
| Toxizität |  Radioaktiv | |
| Strichfarbe | weiß | |
| Mineralklasse | Silikate | |
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