[en] Up to date, 21 new minerals have been described from 14 Slovak deposits. Another 39 minerals have provided invaluable information on the scientific knowledge and diversity of individual minerals on Earth. On the territory of Slovakia, the world's most famous locality of occurrence is mainly euchroite, scainiite, hodrushite, kobellite, mrazekite, schafarzikite, vihorlatite, skinnerite, telluronevskite and brandholzite. On a European scale, examples are precious opal from Dubnik, sernarmontite from Pernek and kermesite from Pezinok. While preserving the mineral heritage, it is important to preserve, in particular, the type and rare minerals, especially in large national museums and collections, and to deposit other cotype material into other (and private) collections in order to preserve them for future generations in unforeseen circumstances (authors)