numismatic

/ˌnuːmɪzˈmætɪk/
adjective
  1. Relating to the study or collection of coins, paper money, and medals.
    • He joined a numismatic society to learn more about ancient Roman coins.
    • She has a large numismatic collection that includes coins from over fifty countries.
    • The museum's numismatic exhibit displayed rare gold coins from the 18th century.