Square and natural I presume?

[autographcollector11]

Been doing this long enough to spot natural pieces from worked, but this one intrigues me. I suspect it's natural and if so what is it? Found in Wisconsin not too far from a river.

 

[autographcollector11]

Side view....

 

[Deft Tones]

I not any kind of expert so grain of salt time...

Natural rock IMO.

Appears to be sandstone by color, but also has characteristics of slate or shale although I've not seen slate nor shale that color before.

Looks very much like the sandstone bedrock I find in many of our Iowa creeks. As it weathers it fractures and splits into thousands of pieces like that one....but I don't know Wisconsin. Good luck.

 

[rock]

I not any kind of expert so grain of salt time...

Natural rock IMO.

Appears to be sandstone by color, but also has characteristics of slate or shale although I've not seen slate nor shale that color before.

Looks very much like the sandstone bedrock I find in many of our Iowa creeks. As it weathers it fractures and splits into thousands of pieces like that one....but I don't know Wisconsin. Good luck.

Bingo

 

[smokeythecat]

I agree with natural. Some of those can be tricky.