The exhibition downstairs the building gives insight into probably the richest museum mineral collection in Hungary. The visitors are provided with basic information on minerals in the first room. In the next four rooms, nearly 1500 minerals owned by Hungarian mineral societies are shown divided into groups.

The selection and sorting of the material was based on aesthetic and scientific considerations. The visitors will see minerals that anybody can come across during a hike, but also some that are from depths of mines. A number of outstanding items with regard to international interest are also on display in showcases.

The last room presents a temporary exhibition with annually changed material.