malachite vs azurite

malachite and azurite both are nouns.

Word	Noun	Adjective	Verb	Adverb
malachite	Yes	No	No	No
azurite	Yes	No	No	No

As nouns, azurite is a hyponym of malachite; that is, azurite is a word with a more specific, narrower meaning than malachite:

malachite: a green or blue mineral used as an ore of copper and for making ornamental objects
azurite: blue carbonate of copper; blue malachite

malachite (noun)	azurite (noun)
a green or blue mineral used as an ore of copper and for making ornamental objects	blue carbonate of copper; blue malachite