(Grube Teufelsgrund, Belchen, Münstertal, Schwarzwald, Baden-Württemberg, Deutschland)
Ancient fluorite mine, abandoned in 1958.
Located 2.5 km NNW of Belchen mountain.
Ref.:
- Walenta, K. (1992). "Die Mineralien des Schwarzwaldes", Weise (Munich)
- Steen, H. and Markl, G. (1999). Lapis 24(10), 27-36.