Assertion: marble | /r/MadeOf | graphite
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: It is composed primarily of the mineral calcite (CaCO 3 ) and usually contains other minerals, such as clay minerals, micas, quartz, pyrite, iron oxides, and graphite.
text: Usually, marble contains other minerals, including quartz , graphite, pyrite , and iron oxides.