Assertion: beryl | /r/HasProperty | found as accessory constituent
Facets:
value: in metamorphic rocks
type: LOCATION
value: in pegmatites
type: LOCATION
Source sentences:
text: Beryl is a relatively rare rock-forming mineral, and is found as an accessory constituent in pegmatites, in cavities of granitic rocks and occasionally in metamorphic rocks (see Deer et al., 1986).