Assertion: obsidian | /r/HasProperty | polished
Facets:
value: from the stone age
type: TEMPORAL
value: into highly reflective beads
type: OTHER
Source sentences:
text: Obsidian is sometimes faceted and polished into highly reflective beads.
text: From the Stone Age onward, obsidian has been polished, cut, and fashioned in beads and cabochons.
text: From the Stone Age onward, obsidian has been polished, cut, and fashioned in beads and cabochons.