Ankh Amulet Earrings mini hoops adorned with two zircos 
 
The ankh or key of life is an ancient egyptian hieroglyphic symbol used to represent the word for "life" and, by extension, as a symbol of life itself.
As an amulet its a symbol of life, eternal life, and immortality.  
Since ancient time this symbol has been used as an talisman for protection.