Pennsylvanian Bone or Just Stone?

[Lucid_Bot]

I found this on the bank of a stream near Pittsburgh. It looks to me like bone, but perhaps I'm imagining things. It's rather light and I can tell you the stream is part of the Conemaugh Group, Glenshaw Formation and Pennsylvanian/Carboniferous period. Any help is appreciated. (Last pic has the scale.)

[HuckMucus]

I'd go with basalt.

Edited May 8, 2022 by HuckMucus

[val horn]

I dont see bone texture, so i think it a rock

[Lucid_Bot]

Must be my imagination then. Thanks!

[cngodles]

I'll agree with this one, likely an oddly shaped and carved rock from the river. Could be limestone, sandstone, or shale, all possible in the Glenshaw. Lots of sandstone I find in streams is very smooth. However once you smack it with a hammer, the sandy/grainy inside shows what it is.