crystal ball

noun3

1. •
   A globe of glass or crystal that is used to foretell the future.

   • The psychic looked into the crystal ball and saw into the future.
2. •
   One of the magickal tools of Wicca, used for divination and altar purposes.
3. •
   (figurative) A manner or method of seeing into the future.

   • If her past is a crystal ball to her future, she will perhaps never be rich, even though she is a kind, hard-working person.