Coins that have a silver color should not be mistaken for silver. These silver-colored coins are the quarter, nickel and dime coins, made using copper-nickel combination. In the past, only the faces of the coins were plated, which caused the coins to rust. However, advanced technology has eliminated such problems. Today steel is added in the making of all the coins. Metal prices have a strong control over which metal is used even if there are new technologies available.