What is This?

[Birddogski]

What is this?? Found in north central mn lake.   Sure looks like coral.

[tmaier]

Birddogski,

 

 I think your object is a mineral concretion. They can grow in high mineral areas and have this wild growth pattern.
Let other people comment. 
 

[Fossildude19]

Welcome to the Forum.

I moved your post to it's own topic.   More eyes on it this way.  

I agree with tmaier. 

Looks mineral to me, as well. 

Can you get another shot like # 1, but more in focus?

Regards, 

[Vieira]

I don't see any fossil there...

 

Looks mineral like others say.

[fifbrindacier]

I agree for the ID of mineral concretion.

[minnbuckeye]

The bedrock structure of your area is paleoproterozoic so unlikely to produce much unless glaciation brought in something. The rock looks geologic to me. Nice Smallies!!!! From the mighty Mississippi?

[FossilDAWG]

Coral should have corallites, the "holes" or sections where individual polyps (coral animals) lived.  These structures are absent in your specimen.

 

Don

[Kane]

There might be something fossiliferous in this, but at a distance it simply looks "weathered." Are there any unique features in this piece? As @FossilDAWG noted, if it were coral, we'd see some corallites. Zoom in on anything that looks unique in terms of a feature. Look at any colouration or shapes that are not in conformity with the rest of the rock. And, welcome to the Forum.