Coin Term Glossary
At the United States Mint, we use the term uncirculated when referring to the special coining process used to make the coin, which gives it a satin finish. Uncirculated coins are manufactured using the same process as circulating coins, but with quality enhancements such as slightly higher coining force, early strikes from dies, special cleaning after stamping, and special packaging. Uncirculated coins may vary to some degree because of blemishes, toning, or slight imperfections.