Metallurgical assay and the U.S. Mint continue to produce precious metal bullion coins for collectors and investors. The precious metal purity and content of these coins is guaranteed by the respective mint or government, and, therefore, the assay of the raw materials and finished coins is an important quality control. In the UK, the Trial of the Pyx is a ceremonial procedure for ensuring that newly minted coins conform to required standards. Metallurgical assay A metallurgical assay is a compositional analysis of an ore, metal, or alloy. Some assay methods are suitable for raw materials; others are more appropriate for finished goods.
Coins of the Republic of Ireland description of the state as the "Republic of Ireland" did not require any change in the name on coins issued after 1948. The Coinage Act, 1950 changed the law on coinage principally with the removal of silver from coins then in existence. The final piece of primary legislation for predecimal coins was the Coinage (Amendment) Act, 1966 which allowed for a ten shilling coin to be minted and circulated. The ten shilling was the only modern circulating Irish coin not to feature the harp, to incorporate edge lettering, and to depict an actual Irishman (Pádraig Pearse), and to depict a