sunstone vs transparent gem

sunstone and transparent gem both are nouns.

Word	Noun	Adjective	Verb	Adverb
sunstone	Yes	No	No	No
transparent gem	Yes	No	No	No

As nouns, transparent gem is a hypernym of sunstone; that is, transparent gem is a word with a broader meaning than sunstone:

sunstone: a translucent quartz spangled with bits of mica or other minerals
transparent gem: a gemstone having the property of transmitting light without serious diffusion

Other hypernyms of sunstone include quartz.

sunstone (noun)	transparent gem (noun)
a translucent quartz spangled with bits of mica or other minerals	a gemstone having the property of transmitting light without serious diffusion