Assertion: opal's color | /r/HasProperty | vital
Facets:
value: the
type: DEGREE
value: for thousands of years
type: TEMPORAL
value: with aquamarine
type: OTHER
Source sentences:
text: With aquamarine the color is vital.
text: A mineral of many colors that has been treasured as a gem for thousands of years.
text: The more brilliant the color, or fire, the more valuable the gem.