All US dimes until 1965 were struck in 90% silver.
You can tell if a dime or quarter is silver by checking the year minted. Dimes minted before 1965 and quarters minted before 1964 are made of 90% silver. You can also conduct a magnet test - if the coin is attracted to a magnet, it is not silver.
If your 1963 dime is silver, it will not have a copper band along the edge. Instead, the edge of a silver dime will appear silver in color and more uniform in appearance. You can also use a magnet to test its composition - silver dimes are not magnetic.
If its date is 1964 or earlier, it's made of an alloy of 90% silver and 10% copper. All circulating dimes dated 1965 and later are made of copper-nickel, with no silver at all. Starting in 1992, special "Prestige Proof" coin sets have been issued for sale to collectors; the dimes in these sets are again made of 90% silver but these coins don't circulate.
You can check the composition of a 1948 dime using a magnet. If the dime is attracted to the magnet, it likely contains iron and is not pure silver. A pure silver dime will not be attracted to a magnet.
No circulating US coins were ever made of sterling silver (0.925 fine). US dimes, quarters, and halves minted up till 1964, and dollars up to 1935, were made of coin silver which is 0.900 fine.
If it's a US dime dated 1964 or before it's silver
You can tell if a dime or quarter is silver by checking the year minted. Dimes minted before 1965 and quarters minted before 1964 are made of 90% silver. You can also conduct a magnet test - if the coin is attracted to a magnet, it is not silver.
If your 1963 dime is silver, it will not have a copper band along the edge. Instead, the edge of a silver dime will appear silver in color and more uniform in appearance. You can also use a magnet to test its composition - silver dimes are not magnetic.
If its date is 1964 or earlier, it's made of an alloy of 90% silver and 10% copper. All circulating dimes dated 1965 and later are made of copper-nickel, with no silver at all. Starting in 1992, special "Prestige Proof" coin sets have been issued for sale to collectors; the dimes in these sets are again made of 90% silver but these coins don't circulate.
There are no reports of 1965 dimes being struck on old silver blanks used in 1964 and earlier. All dimes dated 1965 and later are made of copper and nickel. Any dime made in 1965 that appears to be silver is almost certainly plated, maybe for use in jewelry or as a novelty item. In any case a genuine silver dime is heavier (6.25 gm) than a copper-nickel dime (5.67 gm) so a good scale will tell you if a coin was plated.
You can check the composition of a 1948 dime using a magnet. If the dime is attracted to the magnet, it likely contains iron and is not pure silver. A pure silver dime will not be attracted to a magnet.
It's worth at least $2 for its silver content, and possibly more depending on condition.
Only the first year-64. You can tell the same way you check other silver coins like dimes-almost everything 64 and earlier had silver. Look at the side of a silver coin-you notice there is no "copper band" or "stripe" now look at the side of a dime or quarter in your pocket-that's how you tell.
The best way to tell would be to weigh it on a sensitive balance. A silver dime would weigh about 2.5 gm while a copper-nickel dime would weigh about 2.27 gm. There have been a few reports of leftover silver planchets being struck accidentally in 1966. More likely, though, your coin has been plated for use in jewelry.
You can tell a coin is silver by either looking at the edge and finding it a uniform silver color (with no darker colors) or by finding a dime, quarter, half dollar or dollar with a date from before 1965. They now make silver versions of the dime, quarter and half, but only in proof sets.
A 1943 dime made of mercury is not rare. It is actually an error coin as dimes were made of silver that year. An authentic 1943 mercury dime would be valuable due to the mistake in using the wrong metal. You should consult with a professional coin collector or numismatist to authenticate the coin's rarity and value.
No genuine US silver dollars were ever made of plated base metal. Copies and fantasy pieces are often made that way, but real US dollar coins are made of the following metals:Up to 1935 : These are true silver dollars made of 90% silver and 10% copper1971-81 and 1999 : Not silver, but 75% copper and 25% nickel outer layers, bonded to a pure copper core2000-present : "golden" dollars made of manganese brass.