There are 2 contenders for the rarest U.S. cent (=penny):
Among circulated coins it's the 1793 "strawberry" design cent, which retails for about $300,000 even in worn condition.
Among UNcirculated coins it's the 1793 "wreath" design cent, which retails for over half a million dollars.
There are several unique British pennies, most notably the 1933 proof issue which is effectively priceless. No one can put a value on it because there is only one.
Painite has been described by the Guinness Book of World Records as the rarest gem mineral. As of early 2005 there have been eighteen known specimens that are all accounted for.
The rarest Lego Star Wars piece is probably the 10k golden C3PO. Made out of real gold, there are very few in the world.
The rarest color for an Aurora Borealis is purple and orange in the aurora australis
Intro-cirrus...the most recently discovered cloud type is, of course, the rarest!
'Rare' used to describe a natural diamond describes many diamonds. Red is generally acknowledged as the most rare natural colour in diamonds. Then, the Moussaieff Red, could be called the world's rarest diamond. You can read more about this stone, below.
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
what is the rarest wood in the world?
The 1931-S has the lowest mintage of that decade.
The 1909 S VDB wheat cent is the rarest to date.