Valuable (adjective)

1. Having a value that is high in monetary or material worth.
2. Having a value that is high in usefulness or importance.

Origin:

From middle english, from old french, from latin valuabilis, from valere (to be worth).

Examples:

1. This painting is valuable.
2. Your advice is valuable.
3. He is a valuable asset to the company.
4. This old coin is considered valuable.
5. The valuable experience will serve her well in her new job.