Collectible coins include various types such as proof coins, which are high-quality strikes produced primarily for collectors. In the United States, these coins are often found in Proof Sets, which feature multiple denominations struck in a polished finish. The 2023 Proof Set, for instance, includes various coins from the current year, showcasing enhanced detail and brilliant luster. The 10-cent coin, commonly known as the dime, is also included in these sets, making it a popular choice among collectors.