Assertion: ore's iron | /r/AtLocation | the earth's crust
Facets:
value: commonly
type: DEGREE
Source sentences:
text: The beads contain 7.5% nickel, which is a signature of meteoric origin since iron found in the Earth's crust generally has only minuscule nickel impurities.
text: Iron is commonly found in the Earth's crust in the form of an ore, usually an iron oxide, such as magnetite or hematite.