Assertion: mineral | /r/HasProperty | silicon
Facets:
value: mainly
type: DEGREE
Source sentences:
text: The first rare-earth mineral discovered (1787) was gadolinite, a mineral composed of cerium, yttrium, iron, silicon, and other elements.
text: This is quite high for a mineral composed of aluminum, silicon, and gaseous elements.
text: However, despite the abundance of minerals on the globe, about 90% of the earth’s crust is made up of minerals mainly composed of silicon and oxygen known as silicon minerals.