Large mining district (around 100 mines and ca. 150 veins), active from the 12th century to 1958.
The veins were mined mainly for iron, silver, uranium and fluorite.
References: - Hajek, W., Ihle, F., Lange, R., Müller, S. & Fielder, M. (2008): Lapis 33 (9), 13-39; 58.
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