Assertion: gastropod's shell | /r/ObjectUse | used as money
Facets:
value: by americans
type: OTHER
value: often
type: TEMPORAL
Source sentences:
text: The shells of cowries (a type of small gastropod) were used as money by Native Americans, and the pearls that grow in oysters, as the result of irritation by sand grains, have been treasured since time immemorial.
text: In addition, the shells of cowries were often used as money by Americans.