English

Noun

crystallomancy ‎(uncountable) (also crystalomancy, chrystallomancy, cristallomancy)

1. The use of a crystal or other transparent solid for the purpose of divination.
2. Divination by a crystal ball.

References

"Chrystallomancy, by glasses..." -- The Magastromancer xix, Gaule, 1652

"Precious stones were much used by crystallomancers in the past, the favourite stone being the beryl in pale sea green or reddish tints. By the ancients crystallomancy was practised with a view to the invocation of spirits" -- Encyc. Occult, L. Spence, 1920

• Webster's Revised Unabridged Dictionary. © 1996, 1998 MICRA, Inc.