Possible Small Celt or Tool?

[Briangc]

Any input on these is appreciated, in particular black stone on the left and in individual picture. In group picture the one to the right of it also appears to have a small shell imprint/fossil embedded in it. All found in woods in Illinois.

[fldwlkr]

The black stone looks like a piece of weathered slate to me. Not seeing anything modified by humans. Better images would help. Keep at it... they are out there. Fldwlkr

[Briangc]

Thanks Fldwlkr, I just added a few closeups for review.

[Briangc]

Thanks Fldwlkr for your input, I appreciate it. Here are a few closeups from each side of that one here for review as well.

[Mattern]

I too think it is a type of slate. Kim

[Briangc]

Thank you Kim for weighing in, much appreciated.