spodumene vs hiddenite

spodumene and hiddenite both are nouns.

Word	Noun	Adjective	Verb	Adverb
spodumene	Yes	No	No	No
hiddenite	Yes	No	No	No

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

spodumene: a pyroxene mineral consisting of lithium aluminum silicate; a source of lithium
hiddenite: a green transparent form of the mineral spodumene used as a gemstone

Other hyponyms of spodumene include kunzite.

spodumene (noun)	hiddenite (noun)
a pyroxene mineral consisting of lithium aluminum silicate; a source of lithium	a green transparent form of the mineral spodumene used as a gemstone