Collectible coins include various types such as commemorative coins, bullion coins, and proof coins, each with distinct features and purposes. Medals, which differ from coins, are often created to honor events, individuals, or achievements and may include artistic designs. The United States Mint produces both coins and medals, with specific examples like the U.S. Mint Medals available in limited editions, such as those issued in 2018 from the San Francisco Mint, often featuring unique designs and themes that appeal to collectors.