Wth is this? Heavy

[Caleb12]

 

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[DDancer]

Looks like a sandstone concretion Caleb, cant really make out the bubbly center~ that would be a formation of minerals I think.

 

[Hawks88]

Interesting. No idea.

 

[Ponchosportal]

Either a diamond or a concretion

 

[Caleb12]

has little chess pieces looking things in the center. Almost like it was organic at one point in time.

 

[Caleb12]

 

[Plumbata]

Cool find, I call such pieces "ironstone concretions" but don't know if they have a fancy name.

 

[Caleb12]

How did something man made get in the in the middle?

 

[Caleb12]

 

[Indian Steve]

Cool Rock! What ever happened with all of the diamonds you found?

 

[Rocks A Lot]

Mud stone, iron stone, lode stone or whatever you want to call it. Typical formation is in shale beds below iron Clay's (often orange colored). Some they have fossils inside (rare), reference is mazon Creek fossils.

 

[Rocks A Lot]

View attachment 1680130 has little chess pieces looking things in the center. Almost like it was organic at one point in time.

It appears to just be stalagmite formations inside the mudstone (not uncommon).