The Australian one ounce silver piece (abbreviated as 1 oz and designated with Ag for "silver") is a bullion and commemorative 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 Australian Silver Kangaroo coin range was introduced in 1993 by the Royal Australian Mint; subsequently, the Perth Mint also started issuing Kangaroo bullion coins. The coins have legal tender status in Australia and are one of few legal tender bullion silver coins to change their design every year. This and their limited annual mintage may, unlike for many other bullion coins, raise their numismatic value over the value of silver used.
This coin is part of the long-running Australian Kangaroo bullion coin series by the Perth Mint, and is a "numismatic" issue with a one-year design. The coin has high relief and is thicker and smaller in diameter than regular silver ounce coins.
The Mint says about it:
Marking an exciting new development from The Perth Mint, this remarkable Australian Kangaroo is our very first silver high relief coin to feature colour.
The Australian Kangaroo is The Perth Mint’s signature coin series. Featuring delightful annual designs of Australia’s most famous marsupial, the stunning series offers coins with a variety of numismatic treatments and finishes. Precision-crafted with noticeably raised relief, this 1oz silver version portrays a wonderfully composed portrait of two kangaroos framed by native grass trees. The animals are meticulously coloured - representing the first time we have applied this appealing treatment on a high relief coin. | 
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