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  2. Coinage metals - Wikipedia

    en.wikipedia.org/wiki/Coinage_metals

    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.

  3. Goloid - Wikipedia

    en.wikipedia.org/wiki/Goloid

    Header of U.S. Patent #191,146, "Improvement in Metal Alloys for Commercial Coin" Goloid is an alloy of silver, gold and copper patented by Dr. William Wheeler Hubbell on May 22, 1877 (U.S. patent #191,146).

  4. Coining (mint) - Wikipedia

    en.wikipedia.org/wiki/Coining_(mint)

    A coin die itself, has been the main motive for many collectors coins and medals. One of the most recent and famous one, is the Austrian 700 Years City of Hall in Tyrol coin, minted on January 29, 2003. The reverse side of the coin shows the Guldiner silver coin. However, the design is negative, representing a coin die, as a reference to Hall's ...

  5. Coining (metalworking) - Wikipedia

    en.wikipedia.org/wiki/Coining_(metalworking)

    The term comes from the initial use of the process: manufacturing of coins. Coining is used to manufacture parts for all industries and is commonly used when high relief or very fine features are required. For example, it is used to produce coins, badges, buttons, precision-energy springs and precision parts with small or polished surface features.

  6. Category:Coinage metals and alloys - Wikipedia

    en.wikipedia.org/wiki/Category:Coinage_metals...

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  7. Group 11 element - Wikipedia

    en.wikipedia.org/wiki/Group_11_element

    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.

  8. Electrum - Wikipedia

    en.wikipedia.org/wiki/Electrum

    Natural electrum "wires" on quartz, historic specimen from the old Smuggler-Union Mine, Telluride, Colorado, USA The Pactolus river, from which Lydia obtained electrum for its early coinage Electrum Phoenician bowl with mythological scenes, a sphinx frieze and the repre­sentation of a king vanquishing his enemies, Cypro-Archaic I, from Idalion, 8th–7th centuries BC (Louvre, Paris) Brooch ...

  9. Glossary of numismatics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_numismatics

    bi-metallic coin A coin with one type of metal in the center with an outer ring of a different metal. Examples are the 1 and 2 Euro coins and the Canadian "toonie" two-dollar coin. blank. Also called a planchet or flan. 1. A prepared disk of metal on which the design for a coin will be stamped. [1] 2.