The Australian Silver Koala was first released in 2007. The silver bullion coins were produced by the Perth Mint of Australia following other silver bullion coin series such as the Australian Kookaburra and Australian Lunar series. The koala was chosen as a subject since it is native only to Australia. The Silver Koala has become one of the country's favorite collectible coins and is gaining popularity around the world.
The coins are legal tender in Australia with a face value of one dollar. Each coin contains one ounce of 99.9% pure silver. The obverse carries a picture of the Queen, with inscriptions "Elizabeth II", "Australia", the date, and the face value of "1 Dollar".
The reverse is a different image of a Koala each year. The design for 2009 features a koala clinging to the branch of a tree. The background of the reverse is a unique "shimmer" background. This effect was developed by the Perth Mint. The inscriptions read "1 oz 99.9 Silver" with the "P" mint mark. A different reverse design is used each year featuring a Koala.