Collectible coins, often referred to as numismatic coins, encompass a wide range of items that can include historical coins, commemorative issues, and special mint releases. In the United States, collectible coins may feature denominations such as the 35 cent piece, which is not a standard currency but could refer to specific commemorative or collectible sets that might include unique designs or limited mintage. Collectors often seek coins based on rarity, condition, age, and historical significance, with values determined by market demand and grading standards. The U.S. Mint regularly issues new collectible coins, catering to a diverse array of collectors and investors.