Silver Kookaburra Coins the most beautiful large silver coins in the World! Find out what makes the Australian Kookaburra one of the most sought-after modern silver coins in the world.Like other Australian Perth Mint coins, this coin ships from the mint in a nice capsule that is excellent for stacking. It contains 32.15 ounces of .999 fine silver. This coin is highly sought after by both bullion investors and coin collectors.