quartz glass vs quartz

quartz glass and quartz both are nouns.

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

As nouns, quartz glass and quartz are synonyms defined as:

Other synonyms of quartz glass include crystal, lechatelierite, vitreous silica.

quartz glass (noun)	quartz (noun)
colorless glass made of almost pure silica	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
	colorless glass made of almost pure silica