Assertion: silicate mineral | /r/CapableOf | serve as metal ores
Facets:
value: for lead
type: PURPOSE
Source sentences:
text: Other relatively common carbonate minerals serve as metal ores: siderite, for iron; rhodochrosite, for manganese; strontianite, for strontium; smithsonite, for zinc; witherite, for barium; and cerussite, for lead.