In this part of the Virtual Museum the photographic documentation of voluminous mineralogical and geological collections of the Czech Geological Survey is available. These collections are registered as a whole in the Central Registry of Museum-type Collections (CES) under the Ministry of Culture of the Czech Republic. The exhibits are focused on the regional geology, trying to cover systematically the whole territory of the Czech Republic. So, they are really eceptional from this viewpoint. In the Virtual Museum the rocks are classified and subdivided into groups according to their origin. Moreover, Survey´s coding following web-sites of the Survey is respected. The minerals are classified after Strunze (slightly modified by Bernard). Additional information can be found in the database mineralogical-geological collections of CGS.