Assertion: osmium | /r/HasProperty | blue-black
Facets:
value: in the lead
type: OTHER
Source sentences:
text: It is blue-gray or blue-black and is the densest naturally occurring stable element on earth.
text: In the lead, it is called blue gray and blue black.
text: Osmium is a blue-black or blue-gray metal that belongs to the platinum family of elements.