Dinosaur egg

[Bobmorrison]

Can you tell me if this is a dinosaur egg or not and if so what kind.

[Creek - Don]

That's more likely a worn Septarian Nodule commonly found in Texas. 

 

 

[GeschWhat]

I'm sorry no. What you have is a septarian nodule. 

[Rockwood]

You may also see them called septarian concretions. I've never been sure if there is a real distinction. 

[grandpa]

7 hours ago, Rockwood said:

I've never been sure if there is a real distinction

Concretions vs. nodules - See:

https://www.dmr.nd.gov/ndgs/ndnotes/concretions/concretions.asp

 

Also:

www.thoughtco.com/gallery-of-concretions-4122853

A concretion consists of the same material as the rock around it, plus the cementing mineral, whereas a nodule (like flint nodules in limestone) is composed of different material. Concretions can be shaped like cylinders, sheets, nearly perfect spheres, and everything in between. Most are spherical.

 

As for "Septarian" I quote from:

https://www.spiritofisis.org/knowledge/crystal_files/septarian.htm

"concretions containing angular cavities or cracks, which are called 'septaria'. Septarian usually contain crystals precipitated from circulating solutions, usually of Calcite, Siderite or Pyrite. Some Septarian may also contain small Calcite stalactites and well-shaped Pyrite crystals."

[Rockwood]

I'm just on a lunch break so excuse any unnecessary criticism, but about this post, concretion ?

[pachy-pleuro-whatnot-odon]

@Bobmorrison, you may want to have a look here: