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

addition to calcite but traces of goethite. Pyrite, marcasite, goethite, and gypsum occur widely in argillaceous rocks. Some unusual minerals, e.g., blue lazulite in quartz (Fig. 77), have been found in some pebbly conglomerates which were mostly derived from the Austrian side of the Alps. Finally, in the area of Sopron-Brennbergbánya Miocene coal deposits occur, with the usual mineral assemblage for Hungarian coal deposits of calcite, quartz, pyrite, marcasite, with secondary gypsum, jarosite and rozenite. It may just be worth mentioning that this coal deposit - among the first found in Hungary - has been mined since the middle of the 18th century.