Assertion: azurite's copper | /r/ObjectUse | used starting about 8000 b.c.
Facets:
value: in coins
type: OTHER
value: in ornaments
type: LOCATION
Source sentences:
text: Copper was first used in coins and ornaments starting about 8000 B.C., and at about 5500 B.C., copper tools helped civilization emerge from the Stone Age.