The Collaborative International Dictionary of English v.0.48:

Treasure \Treas"ure\, v. t. [imp. & p. p. Treasured; p. pr. &
   vb. n. Treasuring.]
   To collect and deposit, as money or other valuable things,
   for future use; to lay up; to hoard; usually with up; as, to
   treasure up gold.
   [1913 Webster]

WordNet (r) 3.0 (2006):

treasured
    adj 1: characterized by feeling or showing fond affection for;
           "a cherished friend"; "children are precious"; "a
           treasured heirloom"; "so good to feel wanted" [syn:
           cherished, precious, treasured, wanted]

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "treasured":
   accumulated, admired, adored, amassed, backlogged, beloved,
   cherished, collected, darling, dear, dearly beloved, esteemed,
   favorite, garnered, gathered, held dear, hoarded, laid up, loved,
   pet, popular, precious, prized, revered, stockpiled, stored,
   well-beloved, well-liked