As a result of limited mint production and appealing designs, Australian silver bullion coins are among the more highly desired bullion coins. The national mint produces numerous silver bullion series, such as the Kookaburra Series, in 1-ounce, 2-ounce, 10-ounce, and 1-kilogram bullion rounds; the Lunar Calendar Series, in ½-ounce, 1-ounce, 2-ounce, and 10-ounce rounds as well as ½- and 1-kilogram rounds; and the Koala Series, in ½-ounce, 1-ounce, 10-ounce, and 1-kilogram rounds.