Abrader?

[Vacoyotecatcher]

These were found in the center of where most all my arrowheads have been found

[willjo]

I would not say that is an abrader, most of the ones I find are soft sand stone, not hard like that quartz piece. Usually you see use marks on an abrader.

[SurfaceHunter]

Looks natural most of the ones I find I don’t even keep cause they don’t show much use in this area they liked the limestone cause it’s grainy to the touch. I find it in campsites and it’s grey in color.