| Olivine is not a separate mineral, but a member belonging to the forsterite-fayalite mixing series. Olivine belongs to the olivin-groupe whose end-members are calcio-olivine and tephroite. Forsterite is a magnesium silicate; fayalite an iron silicate. If commonly is spoken of olivine, it is usually ... moreOlivine is not a separate mineral, but a member belonging to the forsterite-fayalite mixing series. Olivine belongs to the olivin-groupe whose end-members are calcio-olivine and tephroite. Forsterite is a magnesium silicate; fayalite an iron silicate. If commonly is spoken of olivine, it is usually a more or less iron-rich forsterite. The color of olivine is generally yellowish green, olive green to black. You will find much more interesting details in our portrait about this common mineral series. Written and investigated by Peter Seroka. (Article in german) |
| Authors present new first records from all over the world. Everybody is invited to share information. ... moreAuthors present new first records from all over the world. Everybody is invited to share information. |
| ... Das seit 1958 blei- und zinkerzfördernde Bergwerk Daoping ist unter Sammlern durch hervorragende, wenn nicht sogar weltbeste Pyromorphitstufen bekannt geworden. Die am Haiyang-Shan-Berg gelegene Mine wurde 2003 mit der nahgelegenen Yangshuo Mine unterirdisch verbunden. Während die Daoping Mine i ... more... Das seit 1958 blei- und zinkerzfördernde Bergwerk Daoping ist unter Sammlern durch hervorragende, wenn nicht sogar weltbeste Pyromorphitstufen bekannt geworden. Die am Haiyang-Shan-Berg gelegene Mine wurde 2003 mit der nahgelegenen Yangshuo Mine unterirdisch verbunden. Während die Daoping Mine im Bezirk Gongcheng liegt, ist die Yangshuo-Grube Teil des Yangshuo-Bezirkes. Beide Gruben bauen denselben Erzkörper ab. Es ist daher nicht verwunderlich das gute Pyromorphitfunde in beiden Gruben gemacht wurden. Die bisher besten Pyromorphite ... Ein Artikel von René Gervers mit Beitrag von Roland Noack |
| In the last 10 years, in addition to further development, the focus has been on cooperation and securing the future. In the year 20 after foundation, we have now taken an overdue and large step in this direction... ... moreIn the last 10 years, in addition to further development, the focus has been on cooperation and securing the future. In the year 20 after foundation, we have now taken an overdue and large step in this direction... |