A ball created from crystal
Used to see and foresee events as the user desires
A Crystal Ball is a magical artifact used by fortune-tellers and clairvoyants for divination. Crystal Balls are round spheres created from glass or crystal. They are transparent and can reveal what the uses wishes to see.
The Source's Oracle used a crystal ball to see the present and future and inform the Source of events that are happening or will happen. The Elder Gideon once used one to spy on the Charmed Ones when they were in Magic School. Gypsies and witches such as Madame Teresa and P. Russell were also shown to have a Crystal Ball in their possession, but they weren't seen using them.