precious stone vs jewel

precious stone and jewel both are nouns.

Word	Noun	Adjective	Verb	Adverb
precious stone	Yes	No	No	No
jewel	Yes	No	Yes	No

As nouns, precious stone and jewel are synonyms defined as:

precious stone and jewel: a precious or semiprecious stone incorporated into a piece of jewelry

Other synonyms of precious stone include gem.

precious stone (noun)	jewel (noun)
a precious or semiprecious stone incorporated into a piece of jewelry	a precious or semiprecious stone incorporated into a piece of jewelry
	a person who is as brilliant and precious as a piece of jewelry

precious stone (verb)	jewel (verb)
	adorn or decorate with precious stones