Assertion: triplet opal | /r/HasProperty | damaged by prolonged exposure
Facets:
value: to any liquid
type: CAUSE
value: to water
type: CAUSE
Source sentences:
text: However, doublet and triplet opals can be damaged by prolonged exposure to water (or any liquid) as the water penetration can cause the glue to deteriorate and eventually separate the layers, causing the opal to take on a foggy or cloudy appearance.