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Castellaccia Mine, Montoccoli-Castellaccia area (Fosso Zanca-Filone di Montoccoli area; Zanca Valley mines), Massa Marittima, Grosseto Province, Tuscany, Italy

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Latitude & Longitude (WGS84): 43° 2' 29'' North , 10° 55' 54'' East
Latitude & Longitude (decimal): 43.0413888889, 10.9316666667
Name(s) in local language(s):Miniera della Castellaccia, Area di Montoccoli-Castellaccia (Area di Fosso Zanca-Filone di Montoccoli; Miniere della valle Zanca), Massa Marittima, Provincia di Grosseto, Toscana, Italia

Located about 1 km SW of Poggio al Montone, on the right side of Zanca stream.

First workings date back to 1775; after a period of inactivity, the mine was reopened in 1840 and operated till 1897. Modern exploration works for mixed sulphides have been performed in 1961.

Mineral List

18 valid minerals.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Bazzoni C., Mangoni G., Capperi M., Bernocchi M. (2011): Montoccoli-Castellaccia: I minerali delle miniere nella valle del torrente Zanca (Grosseto). Riv. Mineral. Ital., 35, 2 (2-2011), 76-89.

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