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

The Triassic magmatic rocks (metabasalt, meta-andesite) include a copper-bearing mineral assemblage including chalcopyrite, chalcocite and bornite and the secondary copper minerals malachite, covellite, and chrysocolla. Also included, within their quartz-calcite veins, are several silicate minerals, such as albite, epidote, ferroaxinite, clinochlore, and tremolite (Fig. 19). In the silicified tuffs of the Triassic igneous rocks, interesting phosphatic minerals, manganese oxides, and uranium- and beryllium-bearing indications were found. Fig. 20 CALCITE (5.5 cm sp) Fig. 21 HORNBLENDE (1.6 cm xl) Eger Szarvaskő The minerals in the Triassic sedimentary rocks (limestones and dolomites) are almost entirely restricted to calcite and dolomite. Calcite veins, up to a meter in width, include corroded calcite crystals