(Grube Friedrich-August, Horbach, St Blasien, Schwarzwald, Baden-Württemberg, Deutschland)
Ancient nickel mine, abandoned in 1859. Located near Horbach and about 3.5 km SW of St. Blasien.
Refs.:
S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
Mineral List:26 entries listed. 25 valid minerals.
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