Assertion: bronze's copper | /r/HasProperty | smelted with calamine
Facets:
Source sentences:
text: Zinc is practically never found naturally in its pure state, but people had realized that copper smelted with calamine -- a zinc ore -- produced a golden-colored tarnish-resistant metal that was useful for all sorts of things due in part to its low melting point and malleability.
text: Zinc is practically never found naturally in its pure state, but people had realized that copper smelted with calamine -- a zinc ore -- produced a golden-colored tarnish-resistant metal that was useful for all sorts of things due in part to its low melting point and malleability.