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Sterling Silver
Sterling silver is an alloy composed mass fraction (chemistry), by weight of 92.5% silver and 7.5% other metals, usually copper. The sterling silver silver standards, standard has a minimum millesimal fineness of 925. ''Fineness, Fine silver'', which is 99.9% pure silver, is relatively soft, so silver is usually alloyed with copper to increase its hardness and strength. Sterling silver is prone to Tarnish, tarnishing, and elements other than copper can be used in alloys to reduce tarnishing, as well as casting porosity and firescale. Such elements include germanium, zinc, platinum, silicon, and boron. Recent examples of these alloys include Argentium sterling silver, ''argentium'', ''sterlium'' and ''silvadium''. Etymology The term ''sterling silver'' originally meant "silver fit to be used in the making of sterlings", ''sterling'' being another name for the English Penny (English coin), silver penny. The etymology of ''sterling'' itself is Pound_sterling#Etymology, unclear and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alloy
An alloy is a mixture of chemical elements of which in most cases at least one is a metal, metallic element, although it is also sometimes used for mixtures of elements; herein only metallic alloys are described. Metallic alloys often have properties that differ from those of the pure elements from which they are made. The vast majority of metals used for commercial purposes are alloyed to improve their properties or behavior, such as increased strength, hardness or corrosion resistance. Metals may also be alloyed to reduce their overall cost, for instance alloys of gold and Copper(II) sulfate, copper. A typical example of an alloy is SAE 304 stainless steel, 304 grade stainless steel which is commonly used for kitchen utensils, pans, knives and forks. Sometime also known as 18/8, it as an alloy consisting broadly of 74% iron, 18% chromium and 8% nickel. The chromium and nickel alloying elements add strength and hardness to the majority iron element, but their main function is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platinum
Platinum is a chemical element; it has Symbol (chemistry), symbol Pt and atomic number 78. It is a density, dense, malleable, ductility, ductile, highly unreactive, precious metal, precious, silverish-white transition metal. Its name originates from Spanish language, Spanish , a diminutive of "silver". Platinum is a member of the platinum group of elements and group 10 element, group 10 of the periodic table of elements. It has six naturally occurring isotopes. It is one of the Abundance of elements in Earth's crust, rarer elements in Earth's crust, with an average abundance of approximately 5 microgram, μg/kg, making platinum about 30 times rarer than gold. It occurs in some nickel and copper ores along with some Native element mineral, native deposits, with 90% of current production from deposits across Russia's Ural Mountains, Colombia, the Sudbury Basin, Sudbury basin of Canada, and a large reserve in South Africa. Because of its scarcity in Earth's crust, only a f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennyweight
A pennyweight (dwt) is a unit of mass equal to 24 grains, of a troy ounce, of a troy pound, avoirdupois ounce and exactly 1.55517384 grams. It is abbreviated dwt, ''d'' standing for ''denarius'' (an ancient Roman coin), and later used as the symbol of an old British penny (see £sd). History In the Middle Ages, an English penny's weight was literally, as well as monetarily, of an ounce and of a pound of sterling silver. At that time, the pound unit in use in England was the Tower pound, equal to 7,680 Tower grains (also known as wheat grains). The medieval English pennyweight was thus equal to 32 Tower grains. When Troy weights replaced Tower weights in 1527, the Troy weights were defined in such a way that the old Tower pound came out to exactly 5,400 Troy grains (also known as barleycorns), the Tower pennyweight Troy grains (and thus approximately 1.46 grams). After 1527, the English pennyweight was the Troy pennyweight. of 24 Troy grains. Thus the T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Troy Ounce
Troy weight is a system of units of mass that originated in the Kingdom of England in the 15th century and is primarily used in the precious metals industry. The troy weight units are the grain, the pennyweight (24 grains), the troy ounce (20 pennyweights), and the troy pound (12 troy ounces). The troy grain is equal to the grain unit of the avoirdupois system, but the troy ounce is heavier than the avoirdupois ounce, and the troy pound is lighter than the avoirdupois pound. Legally, one troy ounce (oz t) equals exactly 31.1034768 grams. Etymology Troy weight is generally supposed to take its name from the French market town of Troyes where English merchants traded at least as early as the early 9th century. The name ''troy'' is first attested in 1390, describing the weight of a platter, in an account of the travels in Europe of the Earl of Derby. Charles Moore Watson (1844–1916) proposes an alternative etymology: ''The Assize of Weights and Measures'' (also known as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edward I Of England
Edward I (17/18 June 1239 – 7 July 1307), also known as Edward Longshanks and the Hammer of the Scots (Latin: Malleus Scotorum), was King of England from 1272 to 1307. Concurrently, he was Lord of Ireland, and from 1254 to 1306 ruled Duchy of Gascony, Gascony as Duke of Aquitaine in his capacity as a vassal of the French king. Before his accession to the throne, he was commonly referred to as the Lord Edward. The eldest son of Henry III of England, Henry III, Edward was involved from an early age in the political intrigues of his father's reign. In 1259, he briefly sided with a baronial reform movement, supporting the Provisions of Oxford. After reconciling with his father, he remained loyal throughout the subsequent armed conflict, known as the Second Barons' War. After the Battle of Lewes, Edward was held hostage by the rebellious barons, but escaped after a few months and defeated the baronial leader Simon de Montfort at the Battle of Evesham in 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry III Of England
Henry III (1 October 1207 – 16 November 1272), also known as Henry of Winchester, was King of England, Lord of Ireland, and Duke of Aquitaine from 1216 until his death in 1272. The son of John, King of England, King John and Isabella of Angoulême, Henry assumed the throne when he was only nine in the middle of the First Barons' War. Cardinal Guala Bicchieri declared the war against the rebel barons to be a religious crusade and Henry's forces, led by William Marshal, defeated the rebels at the battles of Battle of Lincoln (1217), Lincoln and Battle of Sandwich (1217), Sandwich in 1217. Henry promised to abide by the Magna Carta#Great Charter of 1225, Great Charter of 1225, a later version of the 1215 Magna Carta, which limited royal power and protected the rights of the major barons. Henry's early reign was dominated first by William Marshal, and after his death in 1219 by the magnate Hubert de Burgh. In 1230, the King attempted to reconquer the Angevin Empire, provinces of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Mint
The Royal Mint is the United Kingdom's official maker of British coins. It is currently located in Llantrisant, Wales, where it moved in 1968. Operating under the legal name The Royal Mint Limited, it is a limited company that is wholly owned by His Majesty's Treasury and is under an exclusive contract to supply the nation's coinage. As well as minting circulating coins for the UK and international markets, The Royal Mint is a leading provider of precious metal products. The Royal Mint was historically part of a series of mints that became centralised to produce coins for the Kingdom of England, all of Great Britain, the United Kingdom, and nations across the Commonwealth. The Royal Mint operated within the Tower of London for several hundred years before moving to what is now called Royal Mint Court, where it remained until the 1960s. As Britain followed the rest of the world in decimalising its currency, the Mint moved from London to a new 38-acre (15 ha) plant in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trial Of The Pyx
The Trial of the Pyx () is a judicial ceremony in the United Kingdom to ensure that newly minted coins from the Royal Mint conform to their required dimensional and fineness specifications. Although coin quality is now tested throughout the year under laboratory conditions, the event has become an annual historic tradition. Each year, thousands of coins are put on trial, consisting of both those struck for circulation and non-circulating commemorative coins. First held in the 12th century, the event takes place in the hall of the Worshipful Company of Goldsmiths in London, where the Deputy Master of the Mint (Chief Executive of the Royal Mint) is in effect put on trial before a High Court judge as metallurgical assayers and selected leaders from the financial world sample coins from the mint's output. The boxes in which coins are stored form the ceremony's namesake: the word '' pyx'' derives from the Greek meaning 'wooden box'. History According to records from the Dialog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry II Of England
Henry II () was King of England The monarchy of the United Kingdom, commonly referred to as the British monarchy, is the form of government used by the United Kingdom by which a hereditary monarch reigns as the head of state, with their powers Constitutional monarchy, regula ... from 1154 until his death in 1189. During his reign he controlled Kingdom of England, England, substantial parts of Wales in the High Middle Ages, Wales and Lordship of Ireland, Ireland, and much of Kingdom of France, France (including Duchy of Normandy, Normandy, County of Anjou, Anjou, and Duchy of Aquitaine, Aquitaine), an area that altogether was later called the Angevin Empire, and also held power over Kingdom of Scotland, Scotland and the Duchy of Brittany. Henry was the eldest son of Geoffrey Plantagenet, Count of Anjou, and Empress Matilda, Matilda, daughter of Henry I of England. By the age of fourteen, he became politically and militarily involved in The Anarchy, his mother's efforts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William I Silver Penny C 1075 Moneyer Oswold At The Mint Of Lewes
William is a masculine given name of Germanic origin. It became popular in England after the Norman conquest in 1066,All Things William"Meaning & Origin of the Name"/ref> and remained so throughout the Middle Ages and into the modern era. It is sometimes abbreviated "Wm." Shortened familiar versions in English include Will or Wil, Wills, Willy, Willie, Bill, Billie, and Billy. A common Irish form is Liam. Scottish diminutives include Wull, Willie or Wullie (as in Oor Wullie). Female forms include Willa, Willemina, Wilma and Wilhelmina. Etymology William is related to the German given name ''Wilhelm''. Both ultimately descend from Proto-Germanic ''*Wiljahelmaz'', with a direct cognate also in the Old Norse name ''Vilhjalmr'' and a West Germanic borrowing into Medieval Latin ''Willelmus''. The Proto-Germanic name is a compound of *''wiljô'' "will, wish, desire" and *''helmaz'' "helm, helmet".Hanks, Hardcastle and Hodges, ''Oxford Dictionary of First Names'', Oxford Unive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pound Sterling
Sterling (symbol: £; currency code: GBP) is the currency of the United Kingdom and nine of its associated territories. The pound is the main unit of sterling, and the word '' pound'' is also used to refer to the British currency generally, often qualified in international contexts as the British pound or the pound sterling. Sterling is the world's oldest currency in continuous use since its inception. In 2022, it was the fourth-most-traded currency in the foreign exchange market, after the United States dollar, the euro, and the Japanese yen. Together with those three currencies and the renminbi, it forms the basket of currencies that calculate the value of IMF special drawing rights. As of late 2022, sterling is also the fourth most-held reserve currency in global reserves. The Bank of England is the central bank for sterling, issuing its own banknotes and regulating issuance of banknotes by private banks in Scotland and Northern Ireland. Sterling banknotes issu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penny (English Coin)
The English penny (plural "pence"), originally a coin of pure silver, was introduced by King Offa of Mercia. These coins were similar in size and weight to the continental ''denier (coin), deniers'' of the period and to the Anglo-Saxon sceats which had preceded it. Throughout the period of the Kingdom of England, from its beginnings in the 9th century, the penny was produced in silver. Pennies of the same nominal value, of a pound sterling, were in circulation continuously until the creation of the Kingdom of Great Britain in 1707. Etymology The name "penny" comes from the Old English ''pennige'' (), sharing the same root as the German language, German ''Pfennig''. Its abbreviation d. comes from the Roman ''denarius'' and was used until Decimal Day, decimalisation in 1971. Idioms Due to their ubiquity pennies have accumulated a great number of idioms to their name usually recognizing them for their commonality and minuscule value. These might include: *cut (one) off with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
