Assertion: pebble | /r/HasProperty | picked
Facets:
value: based on colour
type: CAUSE
Source sentences:
text: All pebbles are hand-picked and inspected for sharp edges, size and color.
text: The pebbles are hand-selected based on colour; those having a tint of red, indicating high iron content, are discarded.
text: All pebbles are hand-picked and inspected for breakage, quality and color uniformity prior to packaging.