Assertion: dolomite | /r/MadeOf | alumina
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Dolomite usually contains impurities, chiefly silica, alumina and Iron Oxide.
text: Dolomite usually contains impurities, chiefly silica, alumina and iron oxide.
text: Dolomite usually contains impurities, chiefly silica, alumina and iron oxide.