Biotite from selected localities.
Norway | |
| Svein A. Berge collection/observation 1991. |
| Knut Edvard Larsen observation in field and collection mars 2021 |
| Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 p |
Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineralogie 16. p 520 | |
Andersen, O.(1923): Statsgeologenes innberetninger for 1923. Årbok 1923. Norges Geologiske Undersøkelse. 122, 9-26 | |
Knut Edvard Larsen observation in field mars 2013 | |
Knut Edvard Larsen observation in field oct 2017 | |
Knut Edvard Larsen observation in field 20-09-2017 | |
Knut Edvard Larsen observation in field 20-09-2017 | |
Svein A. Berge collection 1988 |