Trial of the Pyx been properly minted. Criteria are given for diameter, chemical composition and weight for each class of coinage. Statutory basis for the Trial of the Pyx is given by the Coinage Act 1971, the latest in a long series of similarly named Acts of Parliament. Specific procedures are established by Order in Council, the most recent being the Trial of the Pyx Order 1998, which was amended in 2005, 2012 and 2016. It is "not" required for a new Order to be issued for each Trial: this is mandated (to occur) only with regulatory revision. Trial of the Pyx The Trial
Coins of the Australian dollar to as 'silver' though actually 75% copper and 25% nickel, and for many years there were also "bronze" 2¢ and 1¢ coins. The 50¢ coin originally had a circular shape, and contained 80% silver and 20% copper, so that the material of the coin was worth more than 50¢. It was made to almost identical dimensional specifications as the British 2'6 pence half crown. However, to avoid confusion among the round coins, and because of its excess value, it was only produced for one year then withdrawn from circulation; there were no 50-cent coins minted for 1967 or 1968. It