Mexican 1 peso coins minted between 1957 and 1967 contain 10% silver. By weight, that's 1.6 grams of silver per coin.
Yes it is. 10% silver, weighing .05 troy ounce.
No.
American circulation coins were never made of pure silver. They contained at least 10% copper for hardness. 1971 dollar coins for circulation contained NO silver - they were made of copper and nickel. Collectors' coins were struck in 40% silver.
None of the Eisenhower dollars (1971-1978) made for circulation have ANY silver in them. For 1971 only special collectors coins that have "S" mintmark's were struck in 40% silver.
None of the Eisenhower dollars (1971-1978) made for circulation have ANY silver in them. For 1971 only special collectors coins that have "S" mintmark's were struck in 40% silver.
All Morgan and Peace dollars are made of 90% silver and 10% copper. The coins' nominal weight is 26.7 grams so they contain about 25 grams of silver. Any modern (1971-today) $1 coins found in circulation are made of copper-nickel or brass. The only silver "silver dollars" made after 1971 are found in proof or uncirculated sets, or were issued as commemorative coins.
Silver dollar coins (1794-1935) were never made of pure silver. It's too soft and the coins would wear out very quickly. They (and most other silver US coins) were made of an alloy of 90% silver and 10% copper. Circulating US dollar coins were made of copper-nickel from 1971 to 1999. The composition was changed to gold-toned brass in 2000. Modern "eagle" coins with an artificial $1 denomination are made of 99.9% pure silver, but these coins aren't intended for spending.
The series of Eisenhower dollars is a little confusing. Special 40% silver collectors coins were produced from 1971 to 1976. No 1977 or 1978 coins were struck in silver. None of the coins made for and released into circulation contain any silver.
The 1964 is 90% silver and 1965-1970 are 40% silver. All coins from 1971 to date are copper-nickel
None of the Eisenhower dollars (1971-1978) that were released into circulation had any silver! Only special collectors coins sold directly from the US Mint were made from 40% silver and all of them have S mintmarks. None of the Philadelphia or Denver minted coins contain silver. The 40% silver coins were struck only from 1971 to 1976.
No, the majority of them are genuine coins. Until 1967 the Mexican peso was partially silver (though, in 1967 it was only 10% silver) and all the peso coins dated 1967 and earlier contain some silver. Since a lot of them were made, most are not replicas and they are genuine coins. Since many of them were made and they aren't considered to be very attractive and rare coins, they are usually sold for little more than their silver content. Though there are a few replica pesos, the vast majority of them are genuine.
None that were made for circulation. There may have been some special commemorative issues. If you can tell us what the coin is or describe it fully, I can look it up but I'm not going to search through a hundred or more pages to see if there might be one. There are 1979 silver 100 pesos Jose Morelos Coins (partial silver, worth about $5), and silver onza (one ounce) bullion coins (worth about $7.50). These are the only Mexican silver coins from 1979 that I know about.
Are silver coins made by the US Mint. Quarters, Dimes, Half dollars and dollars struck for circulation dated 1964 and prior are 90% silver. Half dollars dated 1965-1970 are 40% silver. All US coins intended for circulation dated 1971 and later are not silver. The US has and does mint silver coins intended for collectors including the American Silver Eagle, since 1992 they have made a silver proof set and there have been many silver commemorative coins minted.
Dollar coins minted in 1971 and later are not silver. From 1971 to 1999 they were made of copper-nickel. Since 2000 they are made of manganese-brass. Unless these coins are uncirculated or proof strikes in their original package they are just ordinary change worth $1 each.