Assertion: opal | /r/HasProperty | coloured
Facets:
value: by traces of other material
type: OTHER
value: especially
type: MANNER
value: brightly
type: MANNER
Source sentences:
text: Opals are multi-coloured and consist of small spheres of silica arranged in a regular pattern, with water between the spheres.
text: Opal can be colorless or colored; its colors can range from white, yellow, orange, and red to green, blue, brown, and black.
text: Opals are not often faceted, that is cut with multiple flat surfaces, because it lessens the effects of the play-of-color within the opal but some transparent or translucent stones can be, especially the brightly colored Fire Opals.
text: Such opal is usually white, grey or brown but can be coloured yellow, orange, green, blue or pink by traces of other material.