Angostura?

[SonOfBeanman]

I bought this at a sale in Des moines, iowa. They said it was found somewhere in Iowa. It is 3 and 3/4 inches long and about an inch wide. Trying to sell, i only keep personal finds.
What do you think about it?
Thanks

 

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[Th3rty7]

Got any mineral deposits or crusty inclusions on that point?

 

[SonOfBeanman]

Got any mineral deposits or crusty inclusions on that point?

Yes there is. where the "step fractures"? are.