The paper summarises historical reports of gold findings and their variable fineness, observation of previous geological and mineralogical research and results of new mineralogical study on museum samples of abundant macroscopic gold from the Kašperské Hory gold-bearing ore district (Šumava…

Accessory polycrase-(Y), uranopolycrase and rutile-like Ti,Nb,Ta,Fe-mineral have been identified in quartz and quartz albitite veins, and silicified phyllites in exocontact zones of tin-bearing granites of the Spiš-Gemer region, Slovak Ore Mountains, eastern Slovakia. Polycrase-(Y) is partly…

Rare supergene antimony sulphate klebelsbergite was found in the abandoned mine adit at 1st vein system of the Kremnica epithermal Au-Ag deposit, Slovak Republic. It forms yellow or white radial and spherical aggregates up to 3 mm, which are consisted of tabular and acicular crystals. Aggregates of…

The rare nickel and bismuth sulphide, parkerite, has been found at mine dump of mine No. 11, the uranium ore district Horní Slavkov, Slavkovský les Mountains (Czech Republic). It forms irregular aggregates up to 100 μm in association with bismuthinite intensive replaced older aggregates of native…

In course of the tunneling of the new railway tunnels (so-called Nové spojení) below the Vítkov Hill in Prague was found the old and unknown mining working - adit about total length ca 120 metres. This adit is by technical remainder probably of the prospecting activities of raw materials in the…

Wollastonite as a rare mineral in iron skarn in Vlastějovice (central Bohemia, Czech Republic), has been discovered for the first time. Unzonal garnet-wollastonite aggregates occur between coarse-grained monomineral calcite rocks and quartz-rich pegmatite vein, which penetrate of…

Pegmatite from Vernéřov near Aš (W Bohemia) forms a steeply dipping, about 1 m stick, more than 1 km long dyke, examined to the depth more than 200 m. The pegmatite is homogeneous, without any type of zonality. The major pegmatite dyke is accompanied by a swarm of thin (up to 10 cm thick) veins. The…

Study of eleven pieces of quartz sandstones come from an archaeological collection of Prague´s Castle showed at least two different rocks provenances. Fine greenish - yellowish soft clayey sandstones, which contain also a small portion of calcite and glauconite was designated as „Zápy“ sandstones,…

The first occurrence of Ag-Pb-Sb sulphosalts was described from Sb mineralization in Tatric Unit in the Western Carpathians. Rare microscopic grains of andorites up to 0.05 mm were identified in antimony deposit Dúbrava (Nízke Tatry Mts., Central Slovakia). Andorites forms inclusions in stibnite.…

Two types of metamanganolite were found at the locality Mísečky near Vernířovice in the Hrubý Jeseník Mountains (northeastern part of the Bohemian Massif, the Czech Republic): (1) pinkish fine-grained quartz-garnet metamanganolite, and (2) grey-green chlorite-quartz-garnet metamanganolite,…

Rare intermetallic mineral cuprostibite was found in a mine dump of shaft No. 16 (Háje near Příbram), the Příbram uranium - base metal ore district, central Bohemia (Czech Republic). Cuprostibite forms there irregular to spherical aggregates up to 0.5 mm in size with metallic lustre in calcite…

Fluvial transport of gravel was studied using pebble size analysis and pebble lithology in the channel of the Berounka River, Czech Republic. Fluvial transport of pebbles of metallurgical slag in the gravels is discussed as a possible indirect analog to the redistribution of moldavites from their…

The first occurrence of Sn-sulphides (stannite and kësterite) was determined in sulphide aggregates in quartz gangue from the mine Bohuliby, the Jílové gold-bearing ore district, central Bohemia (Czech Republic). The Sn-sulphides form myrmekitic aggregates up to 200 μm in size enclosed in…

Magnetite mineralization was found in the quarry approximately 2 kilometres WNW of village Želešice. Magnetite- and silicate-rich layers form lens up to 0.5 m thick and 1.5 m long, enclosed in amphibolite near the contact with biotitic granodiorite. Zoned magnetite grains occur together with…

At mine dump of the mine Lill, the Černojamské ore deposit, Příbram, central Bohemia, Czech Republic, rich aggregates of millerite crystals with rare aggregates of siegenite and heazelwoodite were found. Millerite forms golden acicular crystals up to 1 mm in length with metallic luster growing to…