Assertion: opal | /r/HasSubevent | vibration
Facets:
Source sentences:
text: Crazing may also take place when an opal is subject to vibration, as during the cutting and polishing of a specimen.
text: Crazing may also take place when an Opal is subject to vibration, as during the cutting and polishing of a gemstone.
text: Crazing may also take place when an Opal is subject to vibration, as during the cutting and polishing of a gemstone.