Hydrothermal metasomatites usually accompany all stages in the formation of greisen deposits. The products of the metasomatic reworking of the country rocks in the pre-ore, syn-ore, and post-ore stages provide important information on the hydrothermal processes. The Pravourmi displays a complicated combination of mineral assemblages, which are usually characteristic of tin-bearing objects in various associations, so it is particularly important to examine the mineralogy and geochemistry of the metasomatites from the various stages of mineralization. The paper examines the element assemblages and the type features of certain minerals in the successive metasomatic products. -from Journal summary