Collectible coins can include a variety of types, such as commemorative coins, bullion coins, and historical coins. The United States of America has produced numerous collectible coins, including the iconic Five Dollar gold pieces, which feature various designs commemorating events, states, or figures. The Oregon Gold coins, specifically, refer to gold pieces produced during the California Gold Rush era, celebrating the discovery of gold in Oregon. These coins are often sought after by collectors for their historical significance and unique designs.