abraiding stones and ???

[dump_digger]

I know the abraiding stones, but the other one I initially thought was a bannerstone, but the material just isn't what they would have made a bannerstone out of. So maybe some kind of weight or atl-atl?

 

[quito]

The hole looks very natural to me. So does the rest of that stone.

 

[unclemac]

the abrading stones also are natural