gem

(noun) art highly prized for its beauty or perfection. Synonyms: treasure.

(noun) a crystalline rock that can be cut and polished for jewelry. Synonyms: gemstone, stone. Examples: "He had the gem set in a ring for his wife." "She had jewels made of all the rarest stones."

(noun) a person who is as brilliant and precious as a piece of jewelry. Synonyms: jewel.

(noun) a sweet quick bread baked in a cup-shaped pan. Synonyms: muffin.

(noun) a precious or semiprecious stone incorporated into a piece of jewelry. Synonyms: jewel, precious stone.