Assertion: beryl's color | /r/HasProperty | produced
Facets:
value: almost always
type: DEGREE
Source sentences:
text: When Fe3+ is present substituting for aluminum in the octahedral site the yellow color of heliodor is produced.
text: When both are present the typical blue-green color of aquamarine is produced.
text: Today, nearly all of the gems being sold as "tanzanite" have a blue color that has been produced or enhanced by heating.
text: The color of commercial stones is almost always produced or enhanced by heating brown or green zoisite.