smoky quartz vs quartz

smoky quartz and quartz both are nouns.

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

As nouns, quartz is a hypernym of smoky quartz; that is, quartz is a word with a broader meaning than smoky quartz:

smoky quartz: a smoky yellow or brown quartz
quartz: 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

smoky quartz (noun)	quartz (noun)
a smoky yellow or brown quartz	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