Euro coins edge of the €2 coin also protects it from counterfeiting. Euro coins were designed in cooperation with organisations representing blind persons, and as a result they incorporate many features allowing them to be distinguished by touch alone. In addition, their visual appearance is designed to make them easy to tell apart for persons who cannot read the inscriptions on the coins. The coins increase in size and weight with value. Of the eight denominations of euro coins, the three lowest denominations are small, resemble copper in colour and are quite thin and light. The next three denominations resemble gold in
Australian one dollar coin a number of commemorative issued coins since the Australian $1 was released in 1984, some of which were not released into circulation. Australian one dollar coin The Australian one dollar coin is the second-most-valuable circulation denomination coin of the Australian dollar after the two-dollar coin; there are also non-circulating legal-tender coins of higher denominations (five-, ten-, two-hundred-dollar coins and the one-million-dollar coin). It was first issued on 14 May 1984 to replace the one-dollar note which was then in circulation, although plans to introduce a dollar coin had existed since the mid-1970s. The first year of minting saw 186.3 million