Precious (adjective)

1. Of great value, especially because of being rare or expensive.
2. Regarded with great love and affection.
3. Having great worth, value or esteem.

Origin:

Middle english: from old french precios, from latin pretiosus, from pretium "price".

Examples:

1. The precious jewels were kept in a safe.
2. She had a precious child.
3. The precious stone was set in a ring.
4. He had precious memories of his childhood.
5. The precious metal was used to make a statue.