quartz vs Si

quartz and Si both are nouns.

Word	Noun	Adjective	Verb	Adverb
quartz	Yes	No	No	No
Si	Yes	No	No	No

quartz (noun)	Si (noun)
a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities	a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
colorless glass made of almost pure silica