Assertion: cerium | /r/HasProperty | iron-gray lustrous metal
Facets:
Source sentences:
text: Cerium is an iron-gray lustrous metal.
text: Cerium is an iron-grey lustrous metal.
text: Cerium is an iron-gray lustrous metal.
text: Cerium is an iron-grey lustrous metal, and is malleable and oxidises very readily at room temperature, especially in moist air.