The gold-bearing mineralization in Horská Kvilda area, the Šumava Mountains, Czech Republic Researched large hollows located in the forestry area of Šumava Mts. (SW Bohemia, Czech Republic) between Zhůří and Horská Kvilda villages are supposed to be a primary area of adjoining medieval gold…

Secondary minerals from the base metals mineralization near Valaská Belá, Slovak Republic We describe hydrothermal base metal mineralization, which has not yet been particularly investigated in previous works. Small mine dump occurs in quartz-biotite paragneissis near Valaská Belá in the Strážovské…

Contribution to mineralogy of the base metals ore deposit Plánička - Stříbrník near Klatovy in SW Bohemia (Czech Republic) The ore occurrence Plánička - Stříbrník, ESE from Klatovy (SW Bohemia, Czech Republic) represents a small deposit of Ag-bearing base metals ores. It was mined from the second…

Mo-bearing jarosite from supergene zone of medieval Au-Ag deposit at Hůrky near Rakovník, Czech Republic Molybdenum-bearing jarosite occurs along with other two Mo-secondary minerals, ferrimolybdite and rare wulfenite, in quartz veins of medieval mines at Hůrky near Rakovník in western Bohemia…

Freibergite and jamesonite from the historical silver deposit Šebestěnice near Čáslav, Czech Republic Small Ag-bearing base metals ore deposit Šebestěnice (SSW near Čáslav, central Bohemia, Czech Republic) was last mined in 16th - 18th century and its mineralogy is not known in detail. The ore…

Palygorskite with supergene Pb-minerals from Křižanovice in the Železné hory Mts. (Czech Republic) Palygorskite has been identified during mineralogical studies of samples from the Křižanovice base metals deposit, the Železné hory Mts. (Czech Republic). It is a product of advanced hydrothermal…

Unusual crystal evolution of galena at the base metals ore deposit Radětice, SE of Příbram (Czech Republic) A morphologically anomalous occurrence of galena was found out at the Ag-bearing base metals ore deposit Radětice (ca 8 km SE of Příbram, central Bohemia, Czech Republic) during mining…

Cuprosklodowskite from the uranium deposit Zálesí near Javorník in the Rychlebské hory Mountains (Czech Republic) The supergene copper uranyl silicate, cuprosklodowskite, was found at abandoned mine adits of the Zálesí uranium deposit, located near Javorník, the Rychlebské hory Mountains, Czech…

Phosphorescent whewellite from the Most Basin, Czech Republic Both yellow and white whewellite from the Most Basin (brown coal basin of Neogene age in the NW of Czech Republic) is strongly fluorescent and phosphorescent in long-wave ultraviolet light. Whewellite crystals display in UVA light…

The finds of čejkaite at mine adit of the uranium deposit Rožná, Czech Republic Rare supergene tetrasodium uranyl tricarbonate, čejkaite, was found at mine adit of 24th level of the uranium mine Rožná I, 1 km N of Dolní Rožínka, western Moravia, Czech Republic. It forms thin coatings at fragments…

Agardite-(Ce) from supergene zone of the Vrančice ore deposit near Příbram, Czech Republic Samples containing agardite-(Ce) were found in remnants of mine dumps of abandoned ore deposit Vrančice near Příbram, central Bohemia, Czech Republic. Agardite-(Ce) forms radial light green aggregates up to 1…

Sandstones of the Vladislavský Hall at Prague Castle, Czech Republic For the Late Gothic ribs of the Vladislav Hall were used quartz sandstones from Nehvizdy, Vyšehořovice or Chvaly. Whitish-gray or yellowish sandstones in a course of quick heating use to break and fall off. Thus it was recommanded…

Britholite-(Y): a late-magmatic, Y-REE-bearing accessory mineral from A-type granite in Stupné near Považská Bystrica, Pieniny Klippen Belt, north-western Slovakia Accessory britholite-(Y), (Y,REE,Ca,Th)5(SiO4,PO4)3(F,OH,O), forms 30 μm large inclusion in quartz from Permian A-type granite pebble…

Cu-skarn at Mt. Kotel, the Krkonoše Mts., Czech Republic This paper is focused to geology, petrology and mineralogy of a small Cu-bearing skarn situated at Mt. Kotel in the Krkonoše Mts., Czech Republic. Small gallery from half of 19th Century is situated at the altitude of about 1344 m. The skarn…

Mineralogy of iron ores at the historical deposit Horní Hoštice in the Rychlebské hory Mts. (Czech Republic) Two types of iron ores were studied on the historical deposit at Horní Hoštice in the Rychlebské hory Mts. (eastern part of the Orlica-Śnieżnik Dome): (1) quartz-magnetite(±hematite) ores…

Uranophane and native silver from uranium occurrence Rádlo near Liberec (Czech Republic) Uranophane and native silver were found in an uranium occurrence at Rádlo near Liberec, northern Bohemia (Czech Republic). Uranophane forms tiny veinlets of yellow color shades, solid aggregates and thin…

Native copper from Kovárna Mine at Obří důl, Krkonoše Mts. (Czech Republic) Native copper together with gypsum, chrysocolla and devillin was found in the mediaval Kovárna Mine at Obří důl in the Krkonoše Mts. It forms few red brown grains in the size of 1 - 2 mm. It was apparently formed by the…

Ilmenite from Kozohlody near Golčův Jeníkov (Czech Republic) An ilmenite forming a black and as much as 3 mm thick coat with metallic luster on rutile was newly discovered at the rutile-bearing locality at Kozohlody (4 km W of Golčův Jeníkov, Czech Republic).

Uranophane from uranium deposit Chotěboř, NE from Havlíčkův Brod (Czech Republic) Uranophane has newly been described from uranium deposit at Chotěboř near Havlíčkův Brod (Czech Republic). It occurs as deep yellow solid aggregates maximum 1 cm3 large and also as earthy pulverulent mass and less…

Arsenopyrite from Libodřice near Kolín (Czech Republic) Arsenopyrite has been identified in an amphibolite quarry in operation at Libodřice near Kolín (Czech Republic). It forms steel gray fine-grained aggregates, and also as much as 3 mm large rhombic, short prismatic crystals in a tiny quartz…