a primitive stone artifact (usually made of sandstone) used as an abrader

a primitive stone artifact (usually made of sandstone) used as an abrader

a sedimentary rock consisting of sand consolidated with some cement (clay or quartz etc.)

Small loose grains of worn or disintegrated rock, The loose, granular, gritty particles in an hourglass, Sandstone_ so used in the Pennsylvania petroleum region, where the various beds of petroliferous sandstone are called oil-sands, and designated as first, second, third, etc., in the order in which they are struck in the borings. Similarly, the gas-bearing sandstones are called gas-sands, transitive verb_ To bury (oysters) beneath drifting sand or mud, To sprinkle or cover with sand, To polish or scrape with sand or sandpaper