The Australian tenth-ounce gold piece (abbreviated as 1/10 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.
The first coins in this format were issued by the Perth Mint in what was then called the Australian Nugget series - named after the natural gold nuggets featured on the reverse. However, the series soon started featuring kangaroos instead, and was eventually renamed to Australian Kangaroo. | 
