Fossil or Just Another Rock?

[jedijackie]

Hello everyone 

I have here a specimen and can’t figure out if it’s just a plain ol’rock but I think it might not be a rock at all.

This specimen weighs almost 5lbs it’s original location was found in Carrizo Springs Texas at a drilling rig location. Some helpful info and opinions about what this specimen could be would really be great  -Thanks y’all!

[DatFossilBoy]

Can’t see any fossil here...

I think it might be some mineral like quartz.

lets see what the others say.

[Vieira]

I agree. I don't see any fossil here.

[Tidgy's Dad]

A chert nodule, I think. 

[ynot]

Didn't We already do this one?

Not fossil.