valuable vs precious

valuable is a noun but precious is not a noun.

Word	Noun	Adjective	Verb	Adverb
valuable	Yes	Yes	No	No
precious	No	Yes	No	Yes

valuable (noun)	precious (noun)
something of value

valuable (adjective)	precious (adjective)
having great material or monetary value especially for use or exchange	obviously contrived to charm
having worth or merit or value	characterized by feeling or showing fond affection for
	of high worth or cost
	held in great esteem for admirable qualities especially of an intrinsic nature

valuable (adverb)	precious (adverb)
	very