Assertion: periclase | /r/HasProperty | a source of magnesium
Facets:
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).