The link below give the specifications of all current U.S. coins.
Silver,Copper,Tin,Zinc and Nickel were used in different combinations for all denominations of coins dated from 1960 to 1969. If you want information on a specific coin post new question.
All U.S. quarters minted for circulation since 1965, including the bicentennial quarter, contain 91.67% copper and 8.33% nickel.
Apparently coins are made out of Iron, Metal, Bronze and other of types of metals/brass.
Copper
Silver
Coins are found by the detector sending a pulse which picks up metal signals. Now there are two types a low frequency and a pulse indicator, the low frequency is used to pick up deeper objects
Silver is a type of metal. It is used for jewelry, utensils, coins, and much, much more!
It is used as a metal, and it is used in the coins we use today.
Today in currently circulating coins produced in 2013 there are a number of different metals used. Copper and nickel are used for the nickel, dime, quarter and half dollar. Copper plated zinc is used for the penny and a special alloy of brass is used for the dollar coin. However, silver, gold and platinum are used for commemorative and bullion coins which do not circulate.
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coin
While it is now never used in currency, the metal silver is used in jewellery and photography.
Sears used the JC Higgins name on all types of sporting equipment from the early 1900s until the 1960s, so almost anything could have come in a metal box with that mark. Are there any other markings?
Metals used in Indian coins are nickel, copper, stainless steel, aluminium.