Assertion: obsidian | /r/Synonym | mineraloid
Facets:
value: sometimes
type: TEMPORAL
value: as a volcanic glass
type: OTHER
Source sentences:
text: It is an amorphous material known as a "mineraloid.
text: As a volcanic glass, obsidian is mineral-like, or mineraloid, but is not a true mineral.
text: Obsidians are volcanic glasses referred to as mineraloids.
text: For this reason, the obsidian is sometimes regarded as a mineraloid.
text: It is an amorphous material known as a “mineraloid.