The museum is in the Palazzo Pretorio of Campiglia Marittima, in the historical centre of this little and fascinating town.
It opened in 1968 thanks to a group of local citizens who were passionate about minerals and mining culture. They established the Circolo Mineralogico Toscano (C.M.T.) that was the first group in Italy of that kind.
In the permanent exhibition there are mainly samples of minerals that were extracted during the exploitation of the rich local underground but also minerals coming from the Etruscan Coast as in the case of the Ivaite.
Over the years the collection has grown to include examples of minerals from the other regions of Italy and also samples from North and South Africa and South America, like the Pyrite from Peru. There's also a little piece of asteroid displayed on the underground floor.