Protects the wearer from witchcraft
P. Russell was given this amulet by her lover Anton. It was meant to protect her from her cousins, Bowen and Baxter, when the two decided to kill them and steal their powers. Whenever the cousins attacked Russell, the amulet would neutralize the powers used her, such as Bowen's ice breath. Bowen and Baxter eventually tore the amulet off of Russell's neck before cursing her and her future lives. A little girl named Christina Larson saw it lying on the floor.
In 2000, Phoebe Halliwell became aware of the curse and used a spell to relive her past life. To find out more, she visited the only person still alive that could remember what happened, Christina Larson. She told Phoebe and her sisters about a "pretty necklace" that got torn off the bad witch's neck and slid across the floor.
Phoebe cast the spell again and went looking for the necklace. However, Anton had already taken it. To give herself more time to look for it, Phoebe switched lives with Russell. In the present, Anton then handed the amulet to Russell and tried to kill Prue and Piper. After the sisters vanquished Anton, they took the amulet off Russell, allowing Phoebe to switch back. They then placed the amulet around her neck again, protecting her from the curse.
The Protection Amulet appeared in a total of 2 episodes throughout the course of the series.