* Copper: Copper is a reddish-brown metal that has been used to make coins for centuries. It is the most common metal used for coins, and it is found in pennies, nickels, dimes, quarters, and half dollars.

* Nickel: Nickel is a silvery-white metal that is mixed with copper to make nickels. It is also found in some commemorative coins.

* Silver: Silver is a white metal that is used to make dimes, quarters, half dollars, and dollar coins. It is also found in some commemorative coins.

* Gold: Gold is a yellow metal that is used to make $5, $10, $25, and $50 coins. It is also found in some commemorative coins.

* Platinum: Platinum is a white metal that is used to make $100 coins. It is also found in some commemorative coins.