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 Canadian dollar would melt and refine the remainder of the 245,000 coins to sell the gold content. †Of the 659,693 coins minted, 245,000 were held by the Bank of Canada until 2012, at which time 30,000 hand selected specimens were offered for sale by the Royal Canadian Mint, and the rest reportedly melted. In late 1937, the tools and matrices finally arrived from London, so the issue of the new coins of the reign of King George VI was struck immediately. The coins' current designs date from this period. The coins were as follows: There was also a silver $1 that was