Collectible coins include various types such as standard currency, commemorative coins, and medals. The United States has issued numerous collectible coins, including modern commemorative sets that celebrate significant events, people, or places in American history. The 2013 Modern Commem Set features coins that commemorate specific themes and showcases unique designs, appealing to both collectors and history enthusiasts. These sets are often minted in limited quantities and may include gold, silver, or clad compositions, adding to their desirability.