The 'Hamsa', a palm-shaped amulet with a jewel in the center worn to ward off the Evil Eye.  Popularized in the Middle East, Rome, and Africa.  Worn on the person, or used as wall hangings to protect the home. 

 

Hamsa Prayer:

 

Let no sadness come through this gate,
Let no trouble come to these walls,
Let no conflict be in this place,