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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.
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The alloying with other metals makes the resulting coins harder, less likely to become deformed and more resistant to wear. Gold coins: Gold coins are typically produced as either 90% gold (e.g. with pre-1933 US coins), or 22 carat (91.66%) gold (e.g. current collectible coins and Krugerrands ), with copper and silver making up the remaining ...
Striking a coin refers to pressing an image into the blank metal disc, or planchet, and is a term descended from the days when the dies were struck with hammers to deform the metal into the image of the dies. Modern dies made out of hardened steel are capable of producing many hundreds of thousands of coins before they are retired and defaced.
Copper Coinage Act of 1792 was penned as two sections providing authorizations and rulings for the issuance of authentic copper currency by the United States Mint. 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.
This included the coinage of silver and the purchase of bullion, the exchange of gold coins for gold bars, the subject of mutilated coins, and the coinage of souvenir and commemorative coins. The committee's jurisdiction also included legislation related to mints and assay offices and the establishment of legal standards of value in the insular ...
Silver coins are one of the oldest mass-produced form of coinage. Silver has been used as a coinage metal since the times of the Greeks; their silver drachmas were popular trade coins. The ancient Persians used silver coins between 612–330 BC. Before 1797, British pennies were made of silver.
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]