gem gem /ˈdʒɛm/

noun

1. () Art highly prized for its beauty or perfection  ( gem , treasure )
   art highly prized for its beauty or perfection
   
2. A precious or semiprecious stone incorporated into a piece of jewelry  ( gem , precious stone , jewel )
   a precious or semiprecious stone incorporated into a piece of jewelry
    She wore a beautiful sapphire jewel around her neck.
   She wore a beautiful sapphire jewel around her neck.
   
   
3. A sweet quick bread baked in a cup-shaped pan  ( gem , muffin )
   a sweet quick bread baked in a cup-shaped pan
    I grabbed a blueberry muffin to go with my coffee on my way to work
   I grabbed a blueberry muffin to go with my coffee on my way to work
   
   
4. A person who is as brilliant and precious as a piece of jewelry  ( gem , jewel )
   a person who is as brilliant and precious as a piece of jewelry
   
5. A crystalline rock that can be cut and polished for jewelry  ( gem , gemstone , stone )
   a crystalline rock that can be cut and polished for jewelry
    He had the gem set in a ring for his wife
   he had the gem set in a ring for his wife
    She had jewels made of all the rarest stones
   she had jewels made of all the rarest stones