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.[1]
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.[2]
Bronze, gold, silver and electrum (a naturally occurring pale yellow mixture of gold and silver that was further alloyed with silver and copper) were used. Silver coins from about 700 BC, are known from Aegina Island.[3]
Early electrum coins from Ephesus, Lydia date from about 650 BC.[4]Ancient India in 6th century BC, was also one of the earliest issuers of coins in the world.[5]
Coins may be composed of multiple metals using alloys, coatings,
or bimetallic forms. Coin alloys include bronze, electrum and cupronickel.
Plating, cladding or other coating methods are used to form an outer layer of metal and are typically used to replace a more expensive metal while retaining the former appearance. For example, United States cents since 1982 are zinc with copper-plating, and thus retain their prior copper look while having a less expensive composition.[8] Coatings may also be used as a form of debasement in commodity money.
Bimetallic coins are used for their distinctive appearance and generally have an outer ring of one metal or alloy surrounding a center of contrasting metal.[9]
Requirements for a coinage metal
Coins that are intended for circulation may circulate for decades and thus must have excellent resistance to wear and corrosion. Achieving this goal typically necessitates the use of base metal alloys. In addition, some metals, such as manganese, are unsuitable as they are too hard to take an impression well or are apt to wear out stamping machines at the mint.
When minting coins, especially low denomination coins, there is a risk that the value of metal within a coin is greater than the face value, leading to negative seigniorage. This leads to the possibility of smelters taking coins and melting them down for the scrap value of the metal. Pre-1992 British pennies were made of 97% copper; but as of 2008, based on the price of copper, the value of a penny from this period is 1.5 new-pence. Modern British pennies are now made of copper-plated steel.
Cupronickel, a base metal alloy with varying proportions of copper and nickel, was introduced as a cheaper alternative for silver in coinage. Cupronickel, most commonly 75% copper, 25% nickel, has a silver color, is hard wearing and has excellent striking properties, essential for the design of the coin to be pressed accurately and quickly during manufacture. However, in the 21st century with the prices of both copper and nickel rising, it has become common to experiment with various alloys of steel, often stainless steel as an even cheaper alternative. For example, in India some coins have been made from a stainless steel that contains 82% iron, 18% chromium, and many other countries that have minted coins that contain metals now worth nearly the coin face-value, are experimenting with various steel alloys. Italy had earlier experimented with acmonital, a stainless steel alloy, for its coins.[10]
A number of more exotic metals have been used to make demonstration or fantasy coins which have not been used to make monetized coins for a nation-state. Some of these elements would make excellent coins in theory (e.g. zirconium). More expensive metals that are intrinsically valuable as commodities are less practical as coinage due to their cost, but could be used for bullion coins.
Numerous Chinese cash coins were made of iron, with the first being issued by the Han dynasty in 118 BCE. From 1942 through 1952, some of the Swedish krona coins – such as the 1, 2 and 5 öre – were made of iron.
Most commonly seen in southeast Asian coinage. Certain 19th-century Japanese coins are also made of lead, such as those issued by Yonezawa in the 1860s.
American wartime "silver nickels" were composed of 56% copper, 35% silver, and 9% manganese. The reason given for this composition is that it matched the magnetic and electrical properties of 75% copper/25% nickel nickels, which was important for vending machines. Modern American dollars contain a small amount of manganese.
Magnesium-aluminum coins were issued in 1943 for the Lodz Ghetto mark in Poland. Magnesium is a minor additive in many aluminum coins; this alloy is called magnalium.
Used unknowingly in alloys since antiquity. The first pure nickel coin was the Swiss 20 Rappen of 1881. A book published by the International Nickel Company of Canada in 1933 lists dozens of coins minted out of nickel.
The Russian 3, 6, and 12 ruble coins of Nicholas I, issued 1828–1845, were the world's only circulating platinum coins. Numerous bullion coins have been issued.
Twelfth century Indian coins were made of zinc. Vietnamese cash coins of the 1800s were made of zinc, as was the Vietnamese Tonkin 1/600 piastre of 1905. Zinc was a common metal of choice for American "good-for" tokens.
An aluminium token coin from the 1887 American Exhibition in London. At the time, aluminium was complex to produce and more valuable than silver
A 1950 iron Swedish krona coin, with face value of 5 öre
In 1992, twenty-four chemical elements used in world coinage were documented by Jay and Marieli Roe in an award-winning exhibit and publication: aluminum, antimony, carbon, cobalt, copper, gold, hafnium, iron, lead, magnesium, molybdenum, nickel, niobium, palladium, platinum, rhenium, silver, tantalum, tin, titanium, tungsten, vanadium, zinc and zirconium.[11][12] Chromium and manganese, however, were not mentioned, even though both elements had been used in common circulation coins (Canada wartime V nickels and US wartime Jefferson nickels, respectively) long before the article's publication.
Non-circulating
Chemical elements used in non-circulating commemorative, demo, bullion or fantasy coins, medals, patterns, and trial strikes:
Cadmium: 1828 medal made by G. Loos for the marriage of Heinrich von Dechen, "of Silesian cadmium".[13]
Cobalt: 2005 Cameroon 750 CFA francs struck in cobalt-plated iron.
Iridium: 2013 1⁄25 oz 10 franc bullion coin issued by Rwanda as part of "Noble Five" precious metals set.
Molybdenum: Demo coin, Fred Zinkann. 2008 1 tr oz coins by Coins By Design, Murray Buckner (mintage 250).
Niobium: Austria has issued a number of bimetallic 25 euro coins with a niobium center.
Palladium: First issued 1966 by Sierra Leone. Also presentation sets from Tonga and bullion coins of various countries.[14]
Rhenium: Fred Zinkann fantasy pieces, Pope Matthew Triple Ducat and Malvinas 5 Australes
Rhodium: 2014 1⁄25 oz 10 franc bullion coin issued by Rwanda as part of "Noble Six" precious metals set. Also Cohen Mint bullion round.
Ruthenium: 1967 1⁄2Hau from Tonga was 98% palladium and 2% ruthenium.
Selenium: 1862 medal in UK Science Museum, commemorating Berzelius, discoverer of the element.
Silicon: Privately struck US quarter patterns dated 1964 (Pollock-5380) in nickel-silicon alloy.
Tantalum: Used in a bimetallic silver-tantalum coin from Kazakhstan.
Tellurium: 1896 Hungarian mining medal. Reproductions exist from 1975.
Titanium: First issued 1999 by Gibraltar.[15] Austria has made bimetallic silver/titanium commemoratives.
Tungsten: While Tungsten alloys are too hard for practical use, a few private demos have been struck for experimentation, e.g. Fred Zinkann US half eagle patterns.
Uranium: Two types of a German medal of native uranium.[16]
Vanadium: 2011 1 Troy ounce coins by Coins By Design, Murray Buckner (mintage 20).
Zirconium: 2012 1 Troy ounce coins, including 50 black & 50 Rainbow, by Coins By Design, Murray Buckner (mintage 500).
Paper 50 kopecks (1923, Soviet Russia). Leiden issued coins made out of the pages of prayer books in 1574 as an emergency issue, making them the first issuers outside of China to issue paper money.
Used in Japan in the 1860s, for Austrian and German notgelds in the 1920s, and Tenino in the 1930s. A Congo 5 francs coin issued in 2006 was perhaps the first 'official' wooden coin.
^
Focardi, Sergio M. (19 March 2018). "3.1: Some brief remarks on money throughout history". Money: What It Is, How It's Created, Who Gets It, and Why It Matters. Economics in the Real World. Abingdon: Taylor & Francis. ISBN9781315391045. Retrieved 18 April 2023. The idea of coinage follows almost naturally from the use of metal as a commodity for exchange. [...] Graeber [...] connects the Axial Age to the first coinage, noting that the three parts of the world where coins were first used correspond to the very parts of the world where religious and philosophical creativity thrived, that is, the kingdoms and city-states around the shores of the Aegean Sea, in the Ganges valley in northern India, and around the Yellow River in China [...].
^Шиканова И.С. Денежные знаки Российско-Американской компании первой половины XIX в. (Памятники денежного обращения XVIII — XX вв.) // Труды ГИМ. — Вып. 53. Нумизматический сборник. Ч. 7. — 1980. — С. 159—169 Шиканова И.С. Новые материалы о денежных знаках Российско-Американской компании. (Новые нумизматические исследования). // Труды ГИМ. — Вып. 61. Нумизматический сборник. Ч. 9. — 1986. — С. 44—47. Иллюстрация
^Normatov, Nodir; Sirtsowa, Yulia, eds. (2009). "Silk Money from Khorezm". San'at. No. 4. Translated by Davidova, Adelia. Academy of Arts of Uzbekistan. Archived from the original on 2020-11-28. Retrieved 2021-03-20.
_-_2.jpg)
.jpg)
