Assertion: black opal | /r/HasProperty | characterised by dark body tone
Facets:
Source sentences:
text: Black opal is characterised by a dark body tone causing brightness of colour which is unmatched by lighter opals.
text: Black opal is characterised by a dark body tone which can range from dark grey to jet black.
text: Black Opal – Black opal is characterised by a dark body tone causing brightness of colour which is unmatched by lighter opals.