Szakáll Sándor - Jánosi Melinda: Minerals of Hungary (Topographia Mineralogica Hungariae 4. Miskolc, 1996)

formed in the oxidation and cementation zones of the limonitic iron ore and in the recrystallised spheroidal sideritic ore (Fig. 27). Particularly interesting silver halide-rich mineral associations (Fig. 28) developed in the siliceous ore types (chlorargyrite, bromargyrite, capgaronnite, perroudite). Because of their beauty, secondary copper minerals such as native copper, malachite, azurite, and cuprite from Rudabánya are deservedly world-famous (Fig. 29). During the last decade small amounts of a number of rarer minerals have been found. The antimonybearing sulfides, the silver minerals, nine species including five halogenides, and the arsenates are particularly worth mentioning. Fig. 29 COPPER (25 cm sp) Rudabánya In some quarries in Tertiary and Quaternary sedimentary rocks (sandstone and shales) finely disseminated green glauconite, sphe-rical barite concretions, earthy vivianite (Rudabánya), and beautiful crystal groups of gypsum (Imola) were discovered.