Assertion: black opal | /r/HasProperty | their dark background
Facets:
value: from other opals
type: OTHER
Source sentences:
text: Black Opal is distinguished from other opals by their dark background (Body Tone) and this characteristic enables the brightness of colour of which they are known.
text: Black Opal is distinguished from other opals by their dark background (Body Tone) and this characteristic enables the brightness of colour of which they are known.