Beckingen-Düppenweil, Touristic Copper Mine (ca. 200 m adit is accessible)
Beckingen-Düppenweil, Village Museum (local minerals, medieval ceramic work)
Bexbach, Mining Museum of Saarland (underground adit, mining equipment & documents, minerals)
Freisen, Mineral Museum (local mineral collection)
Saarbrücken, Geological Museum (Earth history, local geology, minerals, rocks)
Saarlouis, Town Museum (minerals, building stone)
Steinbach, Regional Museum (mining)
Völklingen-Ludweiler, Regional Museum of Warndt (mining, coal geology)
Wadern, Regional Museum (minerals of Hochwald in the area from Lebach to Idar-Oberstein)
Wallerfangen, Regional Museum (minerals, copper mining)

Note: these museums have no own www pages (with one exception), but the respective informations are spread over the "Index of museums in Saarland" (Ortsregister der Museen im Saarland)