containing scratches is a mean of untypical of sedimentary stone
sedimentary is rock. arenaceous_rock is sedimentary_rock. sedimentary_clay is soil. limestone is sedimentary_rock. sandstone is clastic_sedimentary_rock. clastic_sedimentary_rock is sedimentary_rock. sedimentary_rock is rock. slate is sedimentary_rock. sedimentary_rock is stone. scratch is blemish.