I am trying to record this in order of discovery because I find it useful to follow along with the thought process. This might be tiresome if a person just wants answers (whatever THOSE are), but might save someone the thought of "well did he think that...why" didn't he....?" I may have. This is warts and all.
"Roll yer own" waterstones. At least, that's my thought. Here we go....
First the white volcanic ash...
Tuff- slightly lithified volcanic ash, mined as the scouring agent in Old Dutch Cleanser (ODC), blasted from a vent as ash, uniform uncrystalized groundmass. Hardness varying with temperature and degree of welding, clean and not welded. Cudahy mine, El-paso range, kern co. CA
|Smooth, not scratchy (and safe for porcelain, too!)|
NOTE: I'll do better tests soon. This material is turning out to be VERY interesting.