Scrying is the practice of looking into a translucent ball or other material with the belief that things can be seen, such as spiritual visions, and less often for purposes of divination or fortune-telling. The most common media used are reflective, translucent, or luminescent substances such as crystals, stones, glass, mirrors, water, fire, or smoke. Scrying has been used in many cultures in the belief that it can divine the past, present, or future. The visions that come when one stares into the media come from one’s subconscious and imagination, though in the past they were thought to come from gods, spirits, devils, the psychic mind, depending on the culture and practice.
Although scrying is most commonly done with a crystal ball, it may also be performed using any smooth surface, such as a bowl of liquid, a pond, or a crystal.
Scrying is actively used by many cultures and belief systems and is not limited to one tradition or ideology. The Ganzfeld experiment involves sensory deprivation which might be seen as comparable with scrying. According to the small community of parapsychologists, it provides the best known evidence for psi abilities in the laboratory.. Like other aspects of divination and parapsychology, scrying is not supported by mainstream science as a method of predicting the future or otherwise seeing events that are not physically observable.