U.S. coins are the currency used in the United States, produced by the U.S. Mint. They come in various denominations, including penny (1 cent), nickel (5 cents), dime (10 cents), quarter (25 cents), and half dollar (50 cents). Each coin features unique designs, often depicting important figures and symbols from American history. Coins are made from different metals, such as copper, nickel, and zinc. The penny is primarily made of zinc, while the quarter is composed of a mix of copper and nickel. U.S. coins are widely used for everyday transactions and are an essential part of the country's economy.