Assertion: flint | /r/ObjectUse | used by native americans
Facets:
Source sentences:
text: These minerals have played a key role in the development of the state, beginning with the prehistoric period, when flint, mica, clay, and other rocks and minerals were used by Native Americans.
text: These minerals have played a key role in the development of the state, beginning with the prehistoric period, when flint, mica, clay, and other rocks and minerals were used by Native Americans.