Australian one dollar coin
| Australia | |
| Value | 1.00 AUD |
|---|---|
| Mass | 9.00 g |
| Diameter | 25.00 mm |
| Thickness | 3.00 mm |
| Edge | interrupted milled 0.25 mm 77 notches |
| Composition | 92% Copper, 6% Aluminium, 2% Nickel |
| Years of minting | 1984–present |
| Catalog number | — |
| Obverse | |
| Design | Elizabeth II, Queen of Australia |
| Designer | Ian Rank-Broadley |
| Design date | 1999 |
| Reverse | |
 |
|
| Design | Five Kangaroos |
| Designer | Stuart Devlin |
| Design date | 1983 |
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 1970s. The first year of minting saw 186.3 million of the coins produced at the Royal Australian Mint in Canberra.
Three portraits of Queen Elizabeth II have featured on the obverse, the 1984 head of Queen Elizabeth II by Arnold Machin; between 1985 and 1998 the head by Raphael Maklouf; and since 1999 the head by Ian Rank-Broadley. The coin features an inscription on its obverse of AUSTRALIA on the right-hand side and ELIZABETH II on the left-hand side.
The reverse features five kangaroos. The image was designed by Stuart Devlin, who designed Australia's first decimal coins in 1966.
The Royal Australian Mint has released a number of commemorative issued coins since the Australian $1 was released in 1984, some of which were not released into circulation. Circulated coins have their mintage within brackets.
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