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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.
Download QR code; Print/export ... Pages in category "Coinage metals and alloys" The following 22 pages are in this category, out of 22 total. ... Wikipedia® is a ...
Silver coins: Silver coins are typically produced as either 90% silver – in the case of pre-1965 US minted coins (which were circulated in many countries), or sterling silver (92.5%) coins for pre-1920 British Commonwealth and other silver coinage, with copper making up the remaining weight in each case. Old European coins were commonly ...
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]
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]
Patterns of the same design were struck in other metals, including aluminum, copper, normal coin silver, lead, and white metal. In the end, goloid was rejected as a coinage metal because it could not be distinguished from the normal U.S. 90% silver coin alloy without chemical analysis, thus inviting counterfeiters to use silver-copper alloys ...
The alloying metal in England is traditionally restricted to copper.Copper is still used for the current British gold sovereign.An exception was the gold sovereign of 1887, when 1.25% silver, replacing the same weight of copper, was used to gain a better effigy of Queen Victoria for the Golden Jubilee of her reign.
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