on the coin. Unlike rounds, bullion coins are minted by government mints and have a legal tender face value. Bullion coins can have fineness ranging from 91.9% (22 karat) to 99.99% purity (24 karat).

In the United Kingdom coins deemed to be investment coins are exempt from value-added tax (VAT) on transactions. A coin is considered to be an investment coin if it was minted after 1800, and at least 900 thousandths fine, and has been legal tender