Assertion: periclase | /r/CapableOf | occur a source of magnesium
Facets:
value: naturally
type: MANNER
Source sentences:
text: Magnesium oxide, or magnesia, is a white solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide).
text: Magnesium oxide, or magnesia, is a white solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide).