A myriad of things and products that we use every day and without which our life is unimaginable are created using various minerals. This time in the program The Known in the Unknown, we explain what minerals are used in the creation of electrical appliances that we consume every day and how they are obtained. The story is told by Ģirts Stinkulis, Associate Professor of the Department of Geology, Faculty of Geography and Earth Sciences, University of Latvia, and Māris Zeltiņš, Researcher at the Institute of Radioelectronics, Riga Technical University.