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 pound sterling Maundy money is a ceremonial coinage traditionally given to the poor, and nowadays awarded annually to deserving senior citizens. There are Maundy coins in denominations of one, two, three and four pence. They bear dates from 1822 to the present and are minted in very small quantities. Though they are legal tender in the UK, they are never encountered in circulation. The pre-decimal Maundy pieces have the same legal tender status and value as post-decimal ones, and effectively increased in face value by 140% upon decimalisation. Their numismatic value is much greater. Maundy coins still bear the original portrait of