valuable

a.

  1. Having value or worth; possessing qualities which are useful and esteemed; precious; costly; as, a valuable horse; valuable land; a valuable cargo.
  2. Worthy; estimable; deserving esteem; as, a valuable friend; a valuable companion.

n.

  1. A precious possession; a thing of value, especially a small thing, as an article of jewelry; -- used mostly in the plural.