Im not sure what I found please help!

[mikereyes]

I found this on a rock hunting mission

 

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[Old Pueblo]

Slag from an old mine.

 

[Jeff H]

Maybe graphite? See if it will leave a pencil like mark on a piece of paper.

 

[cleo]

I would say slag as well,it still looks cool.

 

[mikereyes]

Yes it is very cool! Made a nice addition to my pond rock collection lol thanks for replying

 

[bradyboy]

so very cool, nice addition for a rock garden

 

[Mud Hut]

Looks like a petrified brisket to me!