The book presents the features of platinum-containing rocks, the conditions of their formation, the main signs and places of occurrence. The orography and geology of the Lower Tagil and Isovsky platinum-containing regions of the Eastern Urals, that is, the main platinum deposits known by the beginning of the twentieth century, are described. In the section of geology, all minerals and ores found in these areas are studied, their classification is given and the peculiarities of occurrence, knowledge of which is necessary during mining, are presented.