Have you seen the structure of minerals under microscope? Do you know what are the chalks, glass, ink and cars made of? What is geology and what does the geologist do? You will see and learn about these and many other interesting things in the Geological corner for children and adults to the Earth and Men National Museum in Sofia (Bulgaria). You can draw or assemble a mineral. And when you answer the riddles hidden in the geological boxes you will find out which are the main properties of minerals.