Assertion: beryl | /r/HasProperty | rare mineral
Facets:
value: relatively
type: DEGREE
value: with a chemical composition
type: OTHER
Source sentences:
text: Beryl is a relatively rare mineral because beryllium rarely occurs in large enough quantities to produce minerals.
text: Beryl is a relatively rare silicate mineral with a chemical composition of Be 3 Al 2 Si 6 O 18 .
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).