Tunaberg, Nyköping, Södermanland, Sweden

Copper and cobalt mines 14 km SSW of Nyköping, active from the 1420s to the 1890s. Cobalt was mined since the 1750s.

References:
- Klaproth, M.H. (1797): Untersuchung des Glanzkobalts von Tunaberg , Beiträge zur chemischen Kenntniss der Mineralkörper, Zweiter Band, Rottmann Berlin, 302-307
- Dobbe, Rene T. M. (1991): Tellurides, selenides, and associated minerals in the Tunaberg copper deposits, SE Bergslagen, central Sweden. Mineralogy and Petrology 44, 89-106.
- Econ. Geol. (1994) 89: 919-930.
- Dobbe, R. T. M.; Oen, I. S. (1994): The polymetallic Cu-Co ores in the central mineralized zone at Tunaberg, Bergslagen, Sweden. Neues Jahrbuch fuer Mineralogie, Abhandlungen 166, 261-294.