The mineral collection in Nagybánya is a real famous one full of rarities and unique pieces that cannot be seen anywhere else. The nicest pieces are regularly shown at international exhibitions since professionals often express their admiration concerning their size, color and development. Gold and other minerals were found in Nagybánya in the 2-3rd century BC. Ever since then, mining is a regular activity in the area. Presently, ten mines are open in Máramaros County.