The first Australian 1 cent coin was dated 1966 along with the first 2, 5, 10, 20 and 50 cent coins.
They were all actually minted in 1965 for the introduction of decimal currency into Australia on the 14th of February, 1966.
The Australian 10 cent coin was first issued on the 14th of February, 1966, and general circulation coins have the following specifications - 10 cent coin - has a silvery appearance, weighs 5.66 grams, is 23.60 mm in diameter, is 2 mm thick, has a reeded edge and is made from 75% copper and 25% nickel. The Australian 10 cent coin has maintained the same specifications since its first issue and features a lyrebird on the reverse.
The Australian 5 cent coin was first issued on the 14th of February, 1966, and general circulation coins have the following specifications - 5 cent coin - has a silvery appearance, weighs 2.83 grams, is 19.41 mm in diameter, is 1.3 mm thick, has a reeded edge and is made from 75% copper and 25% nickel. The Australian 5 cent coin has maintained the same specifications since its first issue and features an echidna on the reverse.
The first, last and only year the round Australian 50 cent coin was issued was in 1966. They were made with an 80% silver content. The price of silver skyrocketed around this time and the silver was worth more than the coin, so they were withdrawn from circulation in 1967. The next Australian 50 cent coin was issued in 1969. It was dodecagonal (12 sided) and made from the more commonplace and cheaper copper-nickel alloy.
The Australian 1 cent coin was first issued on the 14th of February, 1966, and general circulation coins have the following specifications - 1 cent coin - has a coppery appearance, weighs 2.59 grams, is 17.53 mm in diameter, has a plain edge and is made from 97% copper, 2.5% zinc and 0.5% tin. The Australian 1 cent coin maintained the same specifications from its first to last issue and features a feather-tailed glider on the reverse. The 1 cent coins were withdrawn from circulation in 1994, but remain legal tender.
The Australian 2 cent coin was first issued on the 14th of February, 1966, and general circulation coins have the following specifications - 2 cent coin - has a coppery appearance, weighs 5.18 grams, is 21.59 mm in diameter, has a plain edge and is made from 97% copper, 2.5% zinc and 0.5% tin. The Australian 2 cent coin maintained the same specifications from its first to last issue and features a frill necked lizard on the reverse. The 2 cent coins were withdrawn from circulation in 1994, but remain legal tender.
The first and only round Australian 50 cent coin was minted in 1966 and was withdrawn shortly afterwards due to the steep rise in the price of silver. The 1966 round 50 cent coin had an 80% silver content. The next Australian 50 cent coin to be issued was in 1969. It was dodecagonal (12 sided) and made from a copper-nickel alloy.
Other than the initial Australian 1966 50 cent coin which was round, all subsequent Australian 50 cent coins from 1969 have been dodecagonal or 12 sided. Because they are of a similar size to the 20 cent coin, they were made 12 sided so that vision impaired people could feel the difference.
Because it is made from 75% copper and 25% nickel, not iron or steel. No Australian coin is magnetic.
Just about everything is different. The current Australian Ten Dollar note is made from a polymer compound and is an oblong shaped piece of bluish coloured plastic first issued in 1993. The current Australian 50 cent coin is twelve sided (dodecagonal) and made from a copper nickel alloy.
The penny coin which was worth a cent
Australian 2 cent coins were issued from 1966 until 1984 and were made from 97% copper, 2.5% zinc and 0.5% nickel. No general circulation Australian 2 cent coin contained any silver. If you have a silver Australian 2 cent coin, it is because somebody plated it. In 2006, the Royal Australian Mint (RAM) issued a pure gold and a pure silver set of coins, including the 2 cent coin, to commemorate the 40th Anniversary of the Decimal Currency in Australia. The coins were never issued individually.
The original Australian 1966 50 cent coin was made from 80% silver, and after the steep increases in the price of silver in the 1960's, the silver in the coin was worth more than the coin. It took only three 50 cent coins to make one ounce of silver. The coin was no longer cost effective to produce. The 1967 issue was halted and the coins melted down. The next, and all subsequent Australian 50 cent coins were dodecagonal and made from cupro-nickel. The change in shape was to make them more distinguishable from the slightly smaller 20 cent coin.