Precious

Part of speech: adjective (a.)

1. Of great price; costly; as, a precious stone. "The precious bane." Milton.

2. Of great value or worth; very valuable; highly esteemed; dear; beloved; as, precious recollections. She is more precious than rules. Prov. iii. 15. Many things which are most precious are neglected only because the value of them lieth hid. Hooker.

3. Particular; fastidious; overnice. [Obs.] Lest that precious folk be with me wroth. Chaucer. Precious metals, the uncommon and highly valuable metals, esp. gold and silver. -- Precious stones, gems; jewels.