This paper summarizes historical knowledge of pegmatite occurrences in the vicinity of the Skalsko near Jílové u Prahy (central Bohemia, Czech Republic) and presents the results of a new field and laboratory research. The granite pegmatites near Skalsko were subject of intensive mining of feldspar…

Three members of pearceite-polybasite group were found in samples from the Pošepný vein, Alexandr mine, Vrančice near Příbram, central Bohemia (Czech Republic). Polybasite forms there well-developed greyish-black pseudohexagonal tabular crystals up to 3 - 6 mm in size in cavities of…

Rock crystals occur at many sites in the Silesicum in various geological environments. An investigation of their genetic aspects has been carried out using fluid inclusion petrography, microthermometry and oxygen isotope investigations. Results from fluid inclusions and stable oxygen isotopes…

Three selenides were found in a sample from the small uranium deposit of Černý Důl by means of WDS. None of these selenides were found at this locality before. They are relatively rare selenides: bukovite, hakite and klockmannite which are accompanied clausthalite and tiemannite. The selenides grow…

Minerals published during the period 2000 to 2005 from the area of Slovak Republic are described in this paper. The descriptions of 188 mineral species including 4 elements, 59 sulphides and sulphosalts, 2 halides, 34 oxides and hydroxides, 10 carbonates, 11 sulphates, 18 phosphates including…

Porcellanite (fine-grained buchite) occurs at the contact of the dyke of Neogene basanite at Mladějov, Jičín District, North Bohemia. The dyke penetrated the sediments of the Březno Formation in the Jizera development of the Czech Cretaceous Basin. The protolith of the pocellanite was calcareous…

The rare Pb-Cu selenate/sulphate, munakataite, was found at mine dump of the mine Lill, the Černojamské ore deposit, Příbram, central Bohemia (Czech Republic). Munakataite forms thin (1 - 3 μm) acicular crystals up to 400 μm in length forming hemispherical aggregates up to 1 mm in size on quartz…

Fine-crystalline to massive datolite has been identified as nodule and fracture fillings in Permian rift-related metabasalts near Lošonec village, Malé Karpaty Mountains, SW Slovakia. The electron-microprobe and X-ray diffraction data [a = 4.8365(2) å, b = 7.6120(5) å, c = 9.6353(5) å, β =…

Malayaite, a monoclinic mineral CaSn[OI(SiO4)] of the titanite group, was recently identified in skarns NE of Horní Nezdín village ca 5 km NE of the town of Ledeč nad Sázavou (Czech Republic). This locality was geologically explored in search for tungsten in the 1980s. Malayaite associated with…

Schröckingerite was found in the abandoned 5. květen adit of the Vrchoslav hydrothermal fluorite deposit, the Krušné hory Mountains, northern Bohemia, Czech Republic. It forms green-yellow globular to irregular crystalline aggregates with pearly luster up to 3 mm in diameter on the fragments of…

The Cu-mineralization in the big quarry near Košťálov, north-east Bohemia (Czech Republic), discovered in the 2010, is composed of djurleite, brochantite, and chrysocolla. It is present in the small veinlets of montmorillonite with the admixture of barite and calcite. These veinlets penetrate the…

Primary fluid inclusion in quartz crystals from barren subvertical quartz veins that crosscut the Upper Carboniferous (Upper Asturian) coarse-grained clastics at Butov near Stříbro were found to have almost the same microthermometric characteristics (salinity, temperature of homogenization and…

Tourmaline granites, pegmatites and aplites in the Western Granodiorite area of Brno Massif are spatially related to the metapelite enclaves, which represents relict of the contact aureole around biotite granites to amphibol-biotite granodiorites of Tetčice Suite. Tourmaline forms anhedral…