Biotite from Voitsberg District, Styria, Austria
Austria | |
| www.franzbernhard.x10hosting.com (2016) http://www.franzbernhard.x10hosting.com/polishedslabs.html Postl, W. & Bojar, H.-P. (2002) |
| Meixner, H. (1952): Neue Mineralfunde in den österreichischen Ostalpen XII. Carinthia II, 142./62, 27-46. |