Just because...
Where I live the dirt is black clay. I've heard it is not good for pottery. I believe them, but how bad is it?
Figured I'd find out.
Looked for an area with a lot of cracks, dug down below grass. Added water and mixed it up.
After it set for a few minutes I poured it through some screen.
Poured it into a pillowcase to drain the water out.
I will make a small bowl and see what happens. Probably wont be for another week or 2 before I try that.