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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.
Group 11 is also known as the coinage metals, due to their usage in minting coins [2] —while the rise in metal prices mean that silver and gold are no longer used for circulating currency, remaining in use for bullion, copper remains a common metal in coins to date, either in the form of copper clad coinage or as part of the cupronickel alloy.
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U.S. Mint Director, appointed and endorsed by the Coinage Act of 1792, was authorized to contract and purchase a quantity of a group 11 element being pure or unalloyed copper. The coinage metal was to be defined as a federal standard having a consistency in uniformity and weight. [7] [8]
Billon (/ ˈ b ɪ l ən /) 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 bille, which means 'log'. [1]
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Examples of the standard reverse designs minted until 2008. Designed by Christopher Ironside (£2 coin is not shown).. The standard circulating coinage of the United Kingdom, British Crown Dependencies and British Overseas Territories is denominated in pennies and pounds sterling (symbol "£", commercial GBP), and ranges in value from one penny sterling to two pounds.
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