Collectible coins, particularly those from the United States, include various denominations and mintages. The 1985 Denver Mint dime, part of the Roosevelt dime series, is notable for its composition of 91.67% copper and 8.33% nickel. A roll of 10-cent coins, often referred to as a "10c roll," typically contains 50 dimes, totaling $5. Collectors may seek out specific mint marks, such as the "D," which indicates the coin was minted in Denver, or may focus on coins in uncirculated or proof conditions to enhance their collections.