In the Severny pluton in Chukotka, an association of rare-metal, tin-bearing topaz-zinnwaldite greisens (zwitters) and tourmaline metasomatites has been identified through geological mapping and mineralogical-petrographic studies. These formations are genetically linked to magmatism producing Li-F granite intrusions. The distribution and composition of zwitters and muscovite-quartz-tourmaline metasomatites forming halos around quartz-tourmaline veins were investigated. A wide spectrum of tourmaline mineral species was established, occurring in pegmatoid pockets of leucogranites (tourmaline I), pre-ore quartz-tourmaline metasomatite veins with fluorite (tourmaline II), early ore quartz-tourmaline metasomatite veins (tourmaline III), and ore tourmaline and quartz veins (tourmaline IV). An evolution of tourmaline from Sc-bearing fluor-schorl in pre-ore metasomatites to oxy-schorl and tin-bearing ferro-bosiite in tin-ore metasomatites was revealed, with a gradual increase in lithium content and variable iron oxidation state. In zwitters, muscovite-quartz-tourmaline metasomatites, and tourmalinite veins, a combination of tin and rare-metal mineralization is noted. The research results can be used to assess the metallogenic potential and develop criteria for forecasting rare-metal (Nb, Ce, Y, W, Bi) mineralization in the Severny pluton.