Striped flint (sometimes called banded flint) is a version of flint, with a more or less regular system of concentric dark and pale stripes, noted to resemble rolling waters.
Striped flint (sometimes called banded flint) is a version of flint, with a more or less regular system of concentric dark and pale stripes, noted to resemble rolling waters.
A large striped flint deposit is located in Lesser Poland, near the cities of Sandomierz, Ostrowiec Świętokrzyski and Iłża. Because of its rarity and distinctive look, local striped flint is in use today in jewellery [1] and has become a regional export product. [2]
Striped flint was mined by Neolithic people near Krzemionki Opatowskie village around 4,000 BC, and it was used in manufacturing of axes. [3]
Upper Jurassic (Oxfordian) striped flint from Lesser Poland consists mainly of α-quartz. Morphology of grains indicates that the quartz is not a product of opal and chalcedony conversion, but it precipitated directly from the seawater. The crystallinity is higher in the centre of a concretion. Sometimes chalcedony is present, being a product of recrystalization of opal. Other minerals can be found in small quantities: clay minerals, iron oxides and hydroxides, calcite, feldspar, mica, glauconite, zircon, tourmaline and rutile. [4]
Different colouring of individual bands is linked to an increased and decreased number and size of pores that brought about different light reflection. Fewer and smaller pores reflect less light. [5]
Jewellery consists of decorative items worn for personal adornment, such as brooches, rings, necklaces, earrings, pendants, bracelets, and cufflinks. Jewellery may be attached to the body or the clothes. From a western perspective, the term is restricted to durable ornaments, excluding flowers for example. For many centuries metal such as gold often combined with gemstones, has been the normal material for jewellery, but other materials such as glass, shells and other plant materials may be used.
Lesser Poland, often known by its Polish name Małopolska, is a historical region situated in southern and south-eastern Poland. Its capital and largest city is Kraków. Throughout centuries, Lesser Poland developed a separate culture featuring diverse architecture, folk costumes, dances, cuisine, traditions and a rare Lesser Polish dialect. The region is rich in historical landmarks, monuments, castles, natural scenery and UNESCO World Heritage Sites.
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.
Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. It is relatively unreactive.
Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Flint was widely used historically to make stone tools and start fires.
Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place. The particles that form a sedimentary rock are called sediment, and may be composed of geological detritus (minerals) or biological detritus. The geological detritus originated from weathering and erosion of existing rocks, or from the solidification of molten lava blobs erupted by volcanoes. The geological detritus is transported to the place of deposition by water, wind, ice or mass movement, which are called agents of denudation. Biological detritus was formed by bodies and parts of dead aquatic organisms, as well as their fecal mass, suspended in water and slowly piling up on the floor of water bodies. Sedimentation may also occur as dissolved minerals precipitate from water solution.
Sigismund III Vasa was King of Poland and Grand Duke of Lithuania from 1587 to 1632 and, as Sigismund, King of Sweden and Grand Duke of Finland from 1592 to 1599. He was the first Polish sovereign from the House of Vasa. Religiously zealous, he imposed Roman Catholicism across the vast realm, and his crusades against neighbouring states marked Poland's largest territorial expansion. As an enlightened despot, he presided over an era of prosperity and achievement, further distinguished by the transfer of the country's capital from Kraków to Warsaw.
Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Due to its amorphous property, it is classified as a mineraloid, unlike crystalline forms of silica, which are considered minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt.
Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula CuAl6(PO4)4(OH)8·4H2O. It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its unique hue.
Kielce is a city in southern Poland, and the capital of the Świętokrzyskie Voivodeship. In 2021, it had 192,468 inhabitants. The city is in the middle of the Świętokrzyskie Mountains, on the banks of the Silnica River, in the northern part of the historical Polish province of Lesser Poland.
Chert is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). Chert is characteristically of biological origin, but may also occur inorganically as a chemical precipitate or a diagenetic replacement, as in petrified wood.
Diagenesis is the process that describes physical and chemical changes in sediments first caused by water-rock interactions, microbial activity, and compaction after their deposition. Increased pressure and temperature only start to play a role as sediments become buried much deeper in the Earth's crust. In the early stages, the transformation of poorly consolidated sediments into sedimentary rock (lithification) is simply accompanied by a reduction in porosity and water expulsion, while their main mineralogical assemblages remain unaltered. As the rock is carried deeper by further deposition above, its organic content is progressively transformed into kerogens and bitumens.
Stanisław II August, known also by his regnal Latin name Stanislaus II Augustus, and as Stanisław August Poniatowski, was King of Poland and Grand Duke of Lithuania from 1764 to 1795, and the last monarch of the Polish–Lithuanian Commonwealth.
Przemysł II was the Duke of Poznań from 1257–1279, of Greater Poland from 1279 to 1296, of Kraków from 1290 to 1291, and Gdańsk Pomerania (Pomerelia) from 1294 to 1296, and then King of Poland from 1295 until his death. After a long period of Polish high dukes and two nominal kings, he was the first to obtain the hereditary title of king, and thus to return Poland to the rank of kingdom. A member of the Greater Poland branch of the House of Piast as the only son of Duke Przemysł I and the Silesian Princess Elisabeth, he was born posthumously; for this reason he was brought up at the court of his uncle Bolesław the Pious and received his own district to rule, the Duchy of Poznań in 1273. Six years later, after the death of his uncle, he also obtained the Duchy of Kalisz.
Polish cuisine is a style of cooking and food preparation originating in or widely popular in Poland. Due to Poland's history, Polish cuisine has evolved over the centuries to be very eclectic, and it shares many similarities with other regional cuisines. Polish-styled cooking in other cultures is often referred to as à la polonaise.
In modern Western body piercing, a wide variety of materials are used. Some cannot be autoclaved, and others may induce allergic reactions, or harbour bacteria. Certain countries, such as those belonging to the EU, have legal regulations specifying which materials can be used in new piercings.
Concrete degradation may have many different causes. Concrete is mostly damaged by the corrosion of reinforcement bars due to the carbonatation of hardened cement paste or chloride attack under wet conditions. Chemical damages are caused by the formation of expansive products produced by various chemical reactions, by aggressive chemical species present in groundwater and seawater, or by microorganisms. Other damaging processes can also involve calcium leaching by water infiltration and different physical phenomena initiating cracks formation and propagation. All these detrimental processes and damaging agents adversely affects the concrete mechanical strength and its durability.
The Geological Museum of the State Geological Institute is a museum in Warsaw, Poland. The museum was established in 1919.
Henryk Jan Nepomucen Łubieński, Pomian coat of arms, – was the scion of a Polish magnate family, landowner, financier, lawyer, early industrialist, economic activist, and co-founder of the Towarzystwo Kredytowe Ziemskie w Królestwie Polskim, a banking credit institution in Congress Poland. He was elected to the Sejm of Congress Poland and became a government counsel. He rose to the rank of vice president of Bank Polski, the national bank of Poland during the Kingdom of Poland. He was one of the co-founders of the Mill town of Żyrardów and its textile industry in 1832 and a participant in the creation a new industrial and rail infrastructure in Poland.