Assertion: cave's crystal | /r/CapableOf | deteriorate in air
Facets:
Source sentences:
text: The crystals deteriorate in air, so the Naica Project is attempting to visually document the crystals before they deteriorate further.
text: The crystals deteriorate in air, so the Naica Project attempted to visually document the crystals before they deteriorated further.
text: The crystals deteriorate in air, so the Naica Project is attempting to visually document the crystals before they deteriorate further.