'Stone' in the Bible

Who smote Abimelech the son of Jerubbesheth? did not a woman cast the upper stone of a handmill from the wall, that he died in Thebez? why did ye go near the wall? then say thou, Thy servant Urijah the Hittite is dead also.

And if he withdraw into a city, then shall all Israel bring ropes to that city, and we will draw it into the torrent, until there be not one small stone found there.

When they were at the great stone which is in Gibeon, Amasa came before them. And Joab was girded with his coat, his dress, and upon it was the girdle of the sword which was fastened on his loins in its sheath; and as he went forth it fell out.