The Australian one-ounce gold piece (abbreviated as 1 oz and designated with Au for "gold") is a bullion coin format. Uniquely, in Australia there are two mints authorised to strike legal tender: the Royal Australian Mint (which also makes the country's circulating coinage) and the Perth Mint which only makes collector and bullion coins, as well as other bullion products.
Both mints endeavour to create coins with attractive designs, and to introduce new designs and themes often, in order to raise the numismatic value of the coins over the value of previous metal used.
This coloured gold coin with a "domed" shape is the second release in the Beauty, Rich & Rare series, and celebrates the Twelve Apostles rock formation in Victoria.
These stunning columns were formed over thousands of years by erosion from waves crashing onto the shoreline, steadily eroding the softer limestone. At no time since European settlement have there been more than eight Apostles in the feature, now just seven following the collapse of one stack in 2005.
How exactly they came to be the Twelve Apostles is still somewhat a mystery. English explorer George Bass named them the Sow and Piglets. Others called them The Pinnacles. The enduring name, the Twelve Apostles, emerged in the 1880s.
The Twelve Apostles steadily became a major tourist drawcard, especially after construction of the Great Ocean Road by returned servicemen from 1919 to 1932. It is now Victoria’s most visited attraction. | 
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