Up to the present time the physical and chemical properties of cast-rock products as well as the technological process involved in their production has not been adequately discussed in literature. In this paper — „Chemically Resistant Cast-Rock Products“ — some wear-resisting features of molten rock are considered with regard to its chemical composition and mineralogical structure. As reagents the most common acids and alkali in various concentrations have been used. Some experimental data are given showing cast-rock as a material with wide industrial application, chemically resistant and as a good substitute for expensive non-ferrous metals and special corrosion-resisting alloys. Finally, a brief scheme of the technological process is supplied, where the important factors of temperature and time conditioning during a complete production circuit are determined with a view to obtaining the best results in the making of cast-rock products.