Assertion: opal | /r/HasProperty | colourless
Facets:
value: fundamentally
type: DEGREE
Source sentences:
text: Opal is fundamentally colourless, but such material is rarely found.
text: Opal can be colorless or colored; its colors can range from white, yellow, orange, and red to green, blue, brown, and black.
text: Opal is fundamentally colourless, but such high-quality gemstone is rarely found.