Wondering....where to buy other than online? Looked at local stores, nothing similar. What does it even look like. Gray gritty sand? I did buy a scouring stick today at wal-mart called a pumie scouring stick made by United States Pumice Company. Brought it home and crushed it up really fine. That's what it looks like, gray gritty sand. Wanting to make a soap for out in DH's shop. Something to clean off grease grime & grit. Something kinda like lava maybe.