Strange looking rocks?

[bellaLips420]

A garden friend found these at an estate sale,in Kansas.I think I have run across this type of material before here in california,
I want to say shale? but definatly has iron in it.Please give me your suggestions and a link.TY

 

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[Eu_citzen]

Bog ore, or in other words Limonite.

 

[Rasputin]

Bog ore, or in other words Limonite.

Yeppers. EU is right.