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        What is the stone crusher?

        stone - a lump or mass of hard consolidated mineral matter; "he threw a rock at me"

        rock

        natural object - an object occurring naturally; not made by man

        achondrite - a stony meteor lacking chondrules

        bedrock - solid unweathered rock lying beneath surface deposits of soil

        boulder, bowlder - a large smooth mass of rock detached from its place of origin

        calculus, concretion - a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body; "renal calculi can be very painful"

        chondrite - a rock of meteoric origin containing chondrules

        clastic rock - (geology) a rock composed of broken pieces of older rocks

        crystallization, crystal - a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces

        intrusion - rock produced by an intrusive process

        outcrop, outcropping, rock outcrop - the part of a rock formation that appears above the surface of the surrounding land

        pebble - a small smooth rounded rock

        petrifaction - a rock created by petrifaction; an organic object infiltrated with mineral matter and preserved in its original form

        sill - (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock

        stepping stone - a stone in a marsh or shallow water that can be stepped on in crossing

        tor - a prominent rock or pile of rocks on a hill

        wall rock - a rock immediately adjacent to a vein or fault

        whinstone, whin - any of various hard colored rocks (especially rocks consisting of chert or basalt)

        xenolith - (geology) a piece of rock of different origin from the igneous rock in which it is embedded

        crusher - a device that crushes something

        device - an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"

        So what is the stone crusher? It’s obvious from this article!
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