Assertion: ore's iron | /r/HasProperty | rare
Facets:
value: in its metallic state
type: OTHER
value: in the earth's crust
type: LOCATION
value: very
type: DEGREE
Source sentences:
text: Meteoritic iron is very rare, and the metal was probably very expensive, perhaps more expensive than gold.
text: In its metallic state, iron is rare in the Earth's crust, limited to deposition by meteorites.