Assertion: tungsten | /r/HasProperty | obtained
Facets:
value: mostly
type: DEGREE
value: from scheelite
type: OTHER
value: from wolframite
type: LOCATION
Source sentences:
text: Today, tungsten is primarily obtained from wolframite and scheelite (CaWO 4 ) using the same basic method developed by José and Elhuyar.
text: Tungsten is mostly obtained from the minerals scheelite and wolframite which also includes Ferberite and huebnerite in the list.