Assertion: magnesium | /r/HasProperty | extracted
Facets:
value: from the minerals dolomite
type: OTHER
value: from salt brines
type: LOCATION
Source sentences:
text: Magnesium is also extracted from salt brines, which contains about 10 percent magnesium chloride.
text: Today, magnesium can be extracted from the minerals dolomite (CaCO 3 ·MgCO 3 ) and carnallite (KCl·MgCl 2 ·6H 2 O), but is most often obtained from seawater.