Assertion: obsidian's mineral crystal | /r/CapableOf | give rough fracture surface
Facets:
Source sentences:
text: These relatively large mineral crystals (easily visible to the naked eye) give granite a rough fracture surface.
text: These relatively large mineral crystals (easily visible to the naked eye) give granite a rough fracture surface.
text: These relatively large mineral crystals (easily visible to the naked eye) give granite a rough fracture surface.