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 Hungarian forint The 5 & 50 fillér coins were first minted in 1948 and were made of aluminium. Commemorative coins appeared early, the first being a series of 3 coins in 1948 to commemorate the centennial of the 1848 revolution. In 1949 the communist party took power in every field of politics and economy. The country's name was changed to Hungarian People's Republic ("Magyar Népköztársaság") which replaced the former name on the coins. The Kossuth's coat of arms was replaced with the Rákosi's one (see: coat of arms of Hungary). The 2, 10 and 20 fillér coins were made of aluminium after