There are several firearms that were the only one of its type made. As such, they would be tied for the "Most rare" category. My personal choice for the most rare (and weird) would be a revolver- the .307 Schneelock. It fired a triangular bullet. Only one specimen known to exist- and no, not a joke- that really IS the name.
You think the rarest would be when they made some of the first US quarters in our history.
Perhaps Saddam Husain's super gun - there was only ever one made and it is a bit bent now.
Rarest mineral in the US
It depends on what part of the US. But the most rarest silly bandz are: Ocean/Waves, Justin Bieber Pack, Cyclopse, Glow In The Dark Microphone and the last one is Glow In The Dark Unicorn On A Rainbow. These are the most rarest silly bandz in the US.
There is no real data to tell us what the rarest marine fish is. Likely the rarest fish has not yet been discovered, because it is so rare.
Indian head penny
The rarest would be the 1978 God Loveth a Cheerful Giver, its estimated value is around 536 US dollars.
probably the Nerf atomizer. it is a Nerf ball shooter that was made in the 1990's.you can't get it any more unless you ask santa for it. Actually the most rarest gun is the supertech 9000 or the entire supertech line
Gold Eagle Six-pence (half-piece)
100 million Yen or about 1.2 million US Dollars.
mew2 is the rarest
what is the rarest wood in the world?