Assertion: cobalt | /r/HasProperty | lustrous
Facets:
value: very
type: DEGREE
Source sentences:
text: It is lustrous, silver-gray, hard but brittle, and not found as a free metal, but more generally in various ores.
text: Cobalt, with chemical symbol Co and atomic number 27, is a lustrous grey metal and not found in its pure form in nature.
text: Cobalt is a lustrous very hard silvery metal belonging to a group called the "transition metals".