Coins.--
The classification of coins based on various characteristics. These characteristics may include:
- Denomination: such as penny, nickel, dime, quarter, etc.
- Material: such as copper, silver, gold, or a combination of these.
- Era: the time period in which they were minted, such as ancient, medieval, or modern.
- Design: design features, such as portraits, symbols, or abstract patterns.
These categories are used for numismatic purposes, specifically collecting and research.
