spinel vs ceylonite

spinel and ceylonite both are nouns.

Word	Noun	Adjective	Verb	Adverb
spinel	Yes	No	No	No
ceylonite	Yes	No	No	No

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

spinel: a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones
ceylonite: a dark-colored spinel containing iron

Other hyponyms of spinel include ruby spinel, spinel ruby, pleonaste.

spinel (noun)	ceylonite (noun)
a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones	a dark-colored spinel containing iron