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Billon (alloy)
Billon () is an alloy of a precious metal (most commonly silver, but also gold) with a majority base metal content (such as copper). It is used chiefly for making coins, medals, and token coins. The word comes from the French , which means 'log'. History The use of billon coins dates from ancient Greece and continued through the Middle Ages. During the sixth and fifth centuries BC, some cities on Lesbos used coins made of 60% copper and 40% silver. In both ancient times and the Middle Ages, leaner mixtures were adopted, with less than 2% silver content. Billon coins are perhaps best known from the Roman Empire, where progressive debasements of the Roman ''denarius'' and the Roman provincial '' tetradrachm'' in the third century AD led to declining silver and increasing bronze Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dirham Almotadid 20320
The dirham, dirhem or drahm is a unit of currency and of mass. It is the name of the currencies of Moroccan dirham, Morocco, the United Arab Emirates dirham, United Arab Emirates and Armenian dram, Armenia, and is the name of a currency subdivision in Jordanian dinar, Jordan, Libyan dinar, Libya, Qatari riyal, Qatar and Tajikistani somoni, Tajikistan. It was historically a silver coin. Unit of mass The dirham was a unit of mass used across North Africa, the Middle East, Persia and Ifat Sultanate, Ifat; later known as Adal Sultanate, Adal, with varying values. The value of Islamic dirham was 14 qirat. 10 dirham equals 7 mithqal (2.975 gm of silver). In the late Ottoman Empire (), the standard dirham was 3.207 gram, g; 400 dirhem equal one oka (measure), oka. The Ottoman dirham was based on the Sassanian, Sasanian drachm (in Middle Persian: 𐭦𐭥𐭦𐭭 ''drahm''), which was itself based on the Greek Ancient drachma, dram/drachma. In Egypt in 1895, it was equivalen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Debasement
A debasement of coinage is the practice of lowering the intrinsic value of coins, especially when used in connection with commodity money, such as gold or silver coins, while continuing to circulate it at face value. A coin is said to be debased if the quantity of gold, silver, copper or nickel in the coin is reduced. Examples Roman Empire In Roman currency, the value of the denarius was gradually decreased over time as the Ancient Rome, Roman government altered both the size and the silver content of the coin. Originally, the silver used was nearly pure, weighing about 4.5 grams. From time to time, this was reduced. During the Julio-Claudian dynasty, the denarius contained approximately 4 grams of silver, and then was reduced to 3.8 grams under Nero. The denarius continued to shrink in size and purity, until by the second half of the third century, it was only about 2% silver, and was replaced by the Argenteus. Ottoman Empire Weight of akçe in grams of silver and ind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precious Metal Alloys
Precious may refer to: Music * Precious (group), a British female pop group Albums * ''Precious'' (Chanté Moore album), 1992 * ''Precious'' (Conrad Sewell album), 2023 * ''Precious'' (Cubic U album), 1998 * ''Precious'' (Ours album), 2002 * ''Precious'' (Precious album), 2000 * ''Precious'' (soundtrack), the soundtrack album to the 2009 film * ''Precious'' (Sogumm album), 2021 Songs * "Precious" (Depeche Mode song), 2005 * "Precious" (The Jam song), 1982 * "Precious" (Annie Lennox song), 1992 * "Precious" (Pretenders song), 1980 * "Precious" (Vivid song), 2010 * "Precious" (Yuna Ito song), 2006 * "Precious", a song by Conrad Sewell on the album '' Precious'' * "Precious", a song by Jim Jones on the album ''Pray IV Reign'' * "Precious...", a song by Luna Sea on the album ''Luna Sea'' * "Precious", a song by Minipop on the album '' A New Hope'' * "Precious", a 2010 song by Ace of Base Film and television * ''Precious'' (film), a 2009 American drama film * Prec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shakudō
''Shakudō'' (赤銅) is a Japanese billon of gold and copper (typically 4–10% gold, 96–90% copper), one of the '' irogane'' class of colored metals, which can be treated to develop a black, or sometimes indigo, patina, resembling lacquer. Unpatinated ''shakudō'' visually resembles bronze; the dark color is induced by the '' niiro'' artificial patination process, involving boiling in a solution, generally including '' rokushō''. Naming The characters in the name ''shaku-dō'' mean "red" and "copper" but combined they represent this material which begins with a darkened coppery-bronze color and is then modified to black or near-black. History Early uses The word "shakudō" first appears in records of the Japanese Nara period (710-794 AD), but it is not clear to what it referred (it could have been some form of copper, or a form of the now-known material). There are actual pieces known from the 12th century onwards. Shakudō was historically used to construct or decorate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antoninianus
The ''antoninianus'' or pre-reform radiate was a coin A coin is a small object, usually round and flat, used primarily as a medium of exchange or legal tender. They are standardized in weight, and produced in large quantities at a mint in order to facilitate trade. They are most often issued by ... used during the Roman Empire thought to have been valued at 2 ''Denarius, denarii''. It was initially silver, but was slowly debasement, debased to bronze with a minimal silver content. The coin was introduced by Caracalla in early 215 AD. It was silver, similar to the ''denarius'', except that it was slightly larger and featured the Roman emperor, emperor wearing a radiate crown, indicating it was a double denomination. ''Antoniniani'' depicting women (usually the Roman emperor, emperor's wife) featured the bust resting upon a crescent moon. Even at its introduction, the silver content of the ''antoninianus'' was only equal to 1.5 ''denarii''. This created infla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Alloys
This is a list of named alloys grouped alphabetically by the metal with the highest percentage. Within these headings, the alloys are also grouped alphabetically. Some of the main alloying elements are optionally listed after the alloy names. Alloys by base metal Aluminium * AA-8000: used for electrical building wire in the U.S. per the National Electrical Code (US), National Electrical Code, replacing AA-1350. * Al–Li (2.45% lithium): aerospace applications, including the Space Shuttle * Alnico (nickel, cobalt): used for permanent magnets * Aluminium–scandium alloys, Aluminium–Scandium (scandium) * Birmabright (magnesium, manganese): used in car bodies, mainly used by Land Rover cars. * Devarda's alloy (45% Al, 50% Cu, 5% Zn): chemical reducing agent. * Duralumin (copper) * Hiduminium or R.R. alloys (2% copper, iron, nickel): used in aircraft pistons * Hydronalium (up to 12% magnesium, 1% manganese): used in shipbuilding, resists seawater corrosion * Italma (3.5% magnesi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bullion
Bullion is non-ferrous metal that has been refined to a high standard of elemental purity. The term is ordinarily applied to bulk metal used in the production of coins and especially to precious metals such as gold and silver. It comes from the Anglo-Norman term for a melting-house where metal was refined, and earlier from French , "boiling". Although precious metal bullion is no longer used to make coins for general circulation, it continues to be held as an investment with a reputation for stability in periods of economic uncertainty. To assess the purity of gold bullion, the centuries-old technique of fire assay is still employed, together with modern spectroscopic instrumentation, to accurately determine its quality. As investment The specifications of bullion are often regulated by market bodies or legislation. In the European Union, the minimum purity for gold to be referred to as "bullion", which is treated as investment gold with regard to taxation, is 99.5% for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coinage Metals
The coinage metals comprise those metallic chemical elements and alloys which have been used to mint coins. Historically, most coinage metals are from the three nonradioactive members of group 11 of the periodic table: copper, silver and gold. Copper is usually augmented with tin or other metals to form bronze. Gold, silver and bronze or copper were the principal coinage metals of the ancient world, the medieval period and into the late modern period when the diversity of coinage metals increased. Coins are often made from more than one metal, either using alloys, coatings ( cladding/plating) or bimetallic configurations. While coins are primarily made from metal, some non-metallic materials have also been used. History Early coinage made from metal came into use during the Axial Age in the Greek world, in northern India, and in China, as coins became a widespread embodiment of money. Bronze, gold, silver and electrum (a naturally occurring pale yellow mixture of gold and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potin
Potin is a base metal alloy used in coins. It is typically a mixture of copper, tin and lead (in varying proportions) and does not typically contain significant precious metals. Potin is usually used in reference to Celtic coinage. In Celtic coinage In 1890, so-called ''Potin lumps'' were found, of which the largest weighs , at the Prehistoric pile dwelling settlement '' Alpenquai'' in Zürich ( ''Vicus Turicum'') in Switzerland. The pieces consist of a large number of fused Celtic coins, which are mixed with charcoal remnants. Some of the about 18,000 coins originate from the ''Eastern Gaul'', and others are of the ''Zürich'' type, that were assigned to the local ''Helvetii'', which date to around 100 BC. The find is so far unique, and the scientific research assumes that the melting down of the lump was not completed, therefore the aim was to form cult offerings. The site of the find was at that time at least from the lake shore, and probably to deep in the water.''Kelti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monticello
Monticello ( ) was the primary residence and plantation of Thomas Jefferson, a Founding Father, author of the Declaration of Independence, and the third president of the United States. Jefferson began designing Monticello after inheriting land from his father at the age of 14. Located just outside Charlottesville, Virginia, in the Piedmont region, the plantation was originally , with Jefferson using the forced labor of enslaved black people for extensive cultivation of tobacco and mixed crops, later shifting from tobacco cultivation to wheat in response to changing markets. Due to its architectural and historic significance, the property has been designated a National Historic Landmark. In 1987, Monticello and the nearby University of Virginia, also designed by Jefferson, were together designated a UNESCO World Heritage Site. The United States nickel has featured a depiction of Monticello on its reverse every year since 1938 with the exception of 2004-05. Jefferson designe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jefferson Nickel
The Jefferson nickel has been the nickel (United States coin), five-cent coin struck by the United States Mint since 1938, when it replaced the Buffalo nickel. From 1938 until 2004, the copper-nickel coin's Obverse and reverse, obverse featured a profile depiction of Founding Fathers of the United States, Founding Father and third U.S. President Thomas Jefferson by artist Felix Schlag; the obverse design used in 2005 was also in profile, though by Joe Fitzgerald (coin designer), Joe Fitzgerald. Since 2006 Jefferson's portrayal, newly designed by Jamie Franki, faces forward. The coin's reverse is still the Schlag original, although in 2004 and 2005 the piece bore commemorative designs. First struck in 1913, the Buffalo nickel had long been difficult to coin, and after it completed the 25-year term during which it could be replaced only by Congress, the Mint moved quickly to replace it with a new design. The Mint conducted a design competition, in early 1938, requiring that Jeffer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
War Nickel
War is an armed conflict between the armed forces of states, or between governmental forces and armed groups that are organized under a certain command structure and have the capacity to sustain military operations, or between such organized groups. It is generally characterized by widespread violence, destruction, and mortality, using regular or irregular military forces. ''Warfare'' refers to the common activities and characteristics of types of war, or of wars in general. Total war is warfare that is not restricted to purely legitimate military targets, and can result in massive civilian or other non-combatant suffering and casualties. Etymology The English word ''war'' derives from the 11th-century Old English words and , from Old French ( as in modern French), in turn from the Frankish , ultimately deriving from the Proto-Germanic language">Proto-Germanic . The word is related to the Old Saxon , Old High German , and the modern German , meaning . History Anth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
