Extending of knowledge about structural geological position, geochemical specialization and Pt-bearing of the Urals mafic-ultramafic complexes successively led to principal changes of ideas about volume of notions of the «gabbro-peridotite and platinum formations» of the Urals and distinguishing of series of independent all-Uralian platinum belts characterizing the main stages of mobile system’s evolution as well as ophiolitic (osmium-bearing), the platinum and palladium belts.