Assertion: calcite | /r/HasProperty | colourless
Facets:
value: usually
type: DEGREE
Source sentences:
text: Calcite is colourless or white when pure, but it may be of almost any colour – reddish, pink, yellow, greenish, blueish, lavender, black, or brown, owing to the presence of diverse impurities.
text: Calcite is a carbonate mineral (minerals containing CO3) that is usually white or colorless, but can also be gray, yellow or green.
text: Calcite when pure, as in the well-known Iceland-spar, is perfectly transparent and colourless.