Australia has two mints, the Royal Australian Mint (which also makes the country's circulating coinage) and the Perth Mint, which are both very active in the bullion coinage space; coins issued by them are legal tender.
Additionally, there are private issuers of bullion which is not legal tender and is targeted at investors and not at coin collectors - such as this one.
The Mint says about this bar:
Made from 1 kilo of 99.99% pure gold, this cast bar is an addition to The Perth Mint’s physical bullion range at a time when investors are increasingly looking for transparency around the origins of their precious metal purchases.
The Perth Mint is committed to delivering premium gold products to markets across the globe. This commitment includes ensuring our gold is sourced from mines that meet the World Gold Council’s Conflict-free Gold Standard. For investors who wish to own gold bearing a demonstrable commitment to this promise, we are pleased to unveil our new Australian Origin Gold 1 Kilo Cast Bar.
The dimensions listed represent the bar’s maximum possible thickness, length, and width as per our manufacturing tolerances. As all dimensions in a single bar cannot be maximum, actual measurements will vary slightly to ensure compliance with the minimum gross weight requirement.
Accompanied by a Certificate of Origin and Assay Fine Gold, the bar is also inscribed with The Perth Mint’s LBMA-registered swan logo, a unique serial number, as well as its weight and purity.