precious vs valuable

precious is not a noun while valuable is a noun.

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

precious (noun)	valuable (noun)
	something of value

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

precious (adverb)	valuable (adverb)
very