The iron ores were exploited from the Karel vein between villages Milín and Slivice (the Slivice tectonic zone), SE at Příbram (Czech Republic) up to 19th century. Majority of old mine dumps there are aplaned today. During field works in 2007 - 2008 years the fragments of quartz - hematite gangue…

At mine dump of mine Štefánik, the ore deposit Bohutín near Příbram, central Bohemia, Czech Republic, rich aggregates of semseyite crystals with inclusions of fizelyite and galena were found. Semseyite forms steel grey tabular crystals up to 1.5 mm in length with considerable metallic luster growing…

Rare supergene Cu-Zn carbonates, aurichalcite and rosasite, were found in 2007 in remnants of mine dumps of abandoned ore deposit at slope of the Sachrův hřbet hill above Horní Rokytnice (part of Rokytnice nad Jizerou), western Krkonoše Mountains, northern Bohemia, Czech Republic. Aurichalcite forms…

Rare supergene Zn-Cu arsenate, zincolivenite, was found in remnants of mine dumps of the abandoned Stříbrná 2 adit at NW margin of the Krupka town, Krušné hory Mountains, northern Bohemia, Czech Republic. It forms coatings and crusts up to 1 cm2 which are rarely composed by hemispherical aggregates…

Silver-grey aggregates up to 0.5 mm in size were found at a placer of a nameless small stream in the NE part of the Nový Knín gold-bearing district (central Bohemia, Czech Republic). They are identified as gold aggregates (with central part: Au 89.41 - 90.77, Ag 5.81 - 6.14, Hg 0.82 - 2.47 wt. % and…

Gold of high purity (98.6 %), found in quartz pebble from alluvial placers of Otava river near Annín, north of Rejštejn at the Šumava Mountains (Czech Republic), is associated with both native bismuth and joséite A with empirical formula (Bi3.92Au0.03Ag0.04)Σ3.99(Te0.97S2.04)Σ3.01. Joséite A is…

Pseudomalachite was found at mine dumps of the occurrence Breziny, about 200 m northern from the Henclová village, the Slovenské Rudohorie Mountains, Slovak Republic. It forms hemispherical aggregates and crusts (up to 3 x 3 cm in size) in the cavities of quartz gangue in association with malachite,…

Minor occurrence of macroscopic kassiterite in leucogranite is described from a locality near Trhové Sviny. The mineral is identified by microprobe analyses and by X-ray powder diffraction.

Uranium supergene minerals from Háje near Příbram were formed during ca. 30 years storage on a mining dump of the shaft No.16. Following minerals were there identified: brochantite, cerrusite, fourmarierite, liebigite, metazeunerite, natrozippeite, pharmacolite, uranopilite, uranospinite, schoepite,…

In gangue minerals samples from the historical iron and mercury deposit of Jedová hora Hill (formerly Giftberg), an exceptionally mercury rich macroscopic tetrahedrite was found. The average content of mercury detected in this tetrahedrite was 18.26 wt. % (17.52 - 18.73) ~ 1.73 (1.65 - 1.78) apfu.…

Uranopilite from Horní Slavkov (Czech Republic) forms yellow crystalline aggregates of thick tabular crystals up to 0.5 mm. The aggregates seem to be a part of massive assemblages of uranyl supergene phases, so called „gummite”. Uranopilite is triclinic, with the space group P-1. The unit cell…

Hydrothermal veins composed of quartz, calcite and tourmaline of schorl-dravite series are known from many localities in the Šternberk-Horní Benešov Belt, Vrbno Group and Konice-Mladeč Belt in the NE part of the Bohemian Massif. The veins are interpreted to have formed from fluids related to…

Fragments of quartzite with Alpine-type veins were found in the dump material of the Olověná Adit in the Zlaté Hory Ore District. Alpine-type veins in question consist mainly of quartz with minor albite, chlorite (clinochlore), muscovite, rutile (with up to 4.16 wt. % of WO3), apatite-(CaF) and…

On 22 May 1808, a meteorite shower fell at and around the market - town of Stonařov (Stannern) near Jihlava. A commission consisting of K. v. Schreibers and A. v. Widmannstätten was set up in Vienna and sent to investigace the event. They found 61 meteorites weighing a total about 15 kg. The…

A small intrusive body, so far unknown and incorporated in Neoproterozoic volcano-sedimentary complex has been detected in the vicinity of Tlestky-village 19 km WSW of Rakovník. It consists of medium grained gabbroic rock and its petrographic character as well as geological setting show a narrow…

Minerals of tourmaline group in veins are described from several occurrences (Predsvätodušna, Svätodušná, and Podlipa) in the area of the Ľubietová Cu-deposit. They have hydrothermal or hydrothermal-metamorphic origin and take a part in alpine paragenesis in association with quartz, albite,…

Accessory columbite-tantalite forms black tabular crystals (0.2 to 2 mm in size) in fine-grained albite-quartz-muscovite parts of granitic pegmatite dike, associated with Hercynian S-type granite, near Ráztočno village in the Žiar Mountains (Tatric Superunit, Central Western Carpathians, Central…

A quartz gangue with some primary and secondary minerals has recently been studied and described from the Sn-W deposit Cínovec. This gangue with sulfides is accompanied with stolzite, cerussite and native silver (Trangot shaft, 3rd level, Militarschacht), and a tennantite mineralization with kankite…