valued vs precious

valued and precious both are adjectives.

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

As adjectives, valued and precious are synonyms defined as:

valued and precious: held in great esteem for admirable qualities especially of an intrinsic nature

valued (adjective)	precious (adjective)
(usually used in combination) having value of a specified kind	obviously contrived to charm
held in great esteem for admirable qualities especially of an intrinsic nature	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

valued (adverb)	precious (adverb)
	very