Collectible coins, particularly those from the United States, often include specific denominations such as the 25-cent coins, commonly known as quarters. Mint sets, released annually by the U.S. Mint, are collections of coins featuring uncirculated versions from each denomination produced that year. The 2014 Mint Set includes quarters alongside other denominations, showcasing various designs, including those representing state or national parks and commemorative themes. These sets are highly sought after by collectors for their pristine condition and as a complete representation of the year's coinage.