Open English Wordnet
Nouns
(n)gem, treasureart highly prized for its beauty or perfection (n)gem, gemstone, stonea crystalline rock that can be cut and polished for jewelry“he had the gem set in a ring for his wife”,
“she had jewels made of all the rarest stones” (n)jewel, gema person who is as brilliant and precious as a piece of jewelry (n)muffin, gema sweet quick bread baked in a cup-shaped pan