An Australian 1930 Penny is the rarest coin that has ever been released into general circulation in Australian history. Only 3,000 were minted and of those, 1,500 still exist and are trading in todays market. They are still arguing about why the 1930 Penny was released at all. There are only 6 proof coins known to exist, 3 in museums and 3 in private collections. Depending on who you choose to believe, a proof 1930 Penny might go for anything between $250,000 and $500,000 AUD. One of the private collectors has recently declined an offer of $1,000,000 AUD for his proof coin. An uncirculated 1930 penny in absolute mint condition could fetch up to $150,000 AUD. If it is in less than mint condition, it might fetch as little as $10,000 to $15,000 AUD. A reputable coin dealer will be able to give a more accurate valuation. Authentication and verification of such coins is vital. The Australian 1930 Penny has recently been described as the "Holy Grail" of the coin collecting world.
No general circulation Australian 1 cent coin could be considered rare.
The closest any 1 cent coin might get to rare is the 1985 coin, there were only 38.3 million minted.
If you refer only to general circulation coins, the Australian 1930 Penny would be the rarest. There are 1,500 known to exist.
1909
A 1909-S VDB penny!
The rarest British Penny would be the 1954 Penny. There is one known to exist, maybe two, but there could be some doubt about the second.
The rarest and most valuable Lincoln cent that isn't an error is the 1909-S with VDB on it. The rarest and most valuable error Lincoln cent is the 1943 copper penny.
Indian head penny
Indian head penny
If you refer to general circulation Australian Pennies rather than Proof coins, the order runs something like this - 1. 1930 Penny is the rarest 2. 1920 Penny with no dots on the reverse 3. 1925 Penny 4. 1946 Penny
Only the Philadelphia mint made pennies in 1900. There isn't really a rarest.
1909 s vbd
The black opal is the rarest of all opals. It is only found in Australia. About 97 percent of all opals in the world are mined in Australia.
The 1931-S has the lowest mintage of that decade.
The 1909 S VDB wheat cent is the rarest to date.