Assertion: beryllium | /r/MadeOf | mineral
Facets:
Source sentences:
text: The more common beryllium containing minerals include: bertrandite (Be 4 Si 2 O 7 (OH) 2 ), beryl (Al 2 Be 3 Si 6 O 18 ), chrysoberyl (Al 2 BeO 4 ) and phenakite