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

long, crystals of analcime ought to be mentioned (Fig. 47 and 48). They often appear together with variously coloured and shaped groups of calcite crystals. Magnesium minerals of contact metasomatic origin (brucite, chrysotile, lizardite) were found only very rarely in the xenoliths of the andésite. Several minerals which were released by weathering from the andésite (and its inclusions), occur as individual grains in gravel. Near Szentendre and Pomáz these gravels include tiny grains and crystals of gems, such as deep blue sapphire (variety of corundum), dark red and violet almandine, honey-yellow grossular, colourless quartz, and green epidote and diopside. THE BUDA AND PILIS MOUNTAINS In both mountains, calcite and dolomite are the two most common minerals in the widespread Triassic limestones and dolomites. Calcite, which fills fractures in these sedimentary rocks, is sometimes accompanied by barite, gypsum and goethite, as may be seen near Budapest, Budaörs, and Pilisjászfalu (Fig. 49 and 50). Fig. 49 BARITE (12 cm sp) Budapest