Assertion: beach's pebble | /r/HasProperty | common
Facets:
Source sentences:
text: The ovoid or discoidal pebbles of red, purple ("liver-coloured") or white quartzite which seem to have come from the Triassic Budleigh Salterton pebble beds of Devon are common and these are of special interest.
text: Pebbles of hard black, finely granular material are common.