Assertion: silicon | /r/CapableOf | occur as silicate
Facets:
value: commonly
type: TEMPORAL
value: in nature
type: LOCATION
value: usually
type: DEGREE
Source sentences:
text: In nature, Silicon usually occurs as either an oxide or a silicate.
text: It commonly occurs as the oxide and silicates, including sand, quartz, amethyst, agate, flint, jasper, opal, and citrine.