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

thorianite, and thorite occur in mica schists around Füzesárok, near Sopron. Uranium and sulfide ore indications are also known to occur in various rock facies (mica schists, amphibole schists) in the region of Fertőrákos (Gödölye-bérc Hill). Gneiss is also very common in these mountains. Large, and now mostly abandoned, quarries prove how much the rock used to be quarried for roadstone and for the building trade. In some quarries (Harka Hill, Kő Hill) several cm large crystals of rock-forming minerals (quartz, microcline, albite, and muscovite) have been found, together with accessory garnets, and tourmaline (Fig. 75). At Kő Hill, near Kópháza, the oxidised products of galena, sphalerite, pyrite and marcasite form a rich secondary mineral assemblage of goethite, jarosite, gypsum and crandallite in cracks and crevices (Fig. 76). Fig. 77 LAZULITE (4.5 cm sp) Ágfalva This central mass of metamorphic rocks - and remnant metamorphic patches - are surrounded by Miocene, Pliocene and Pleistocene sedimentary rocks. The Miocene 'Lajta limestone' from the vicinity of Fertőrákos was found to be suitable for carving and became a favourite raw material for the master builders of Sopron and even Vienna. It is a very pure limestone containing little in