Lecanomancy, it is a form of hydromancy developed by the ancient Assyrians consisting of divination by interpreting the patterns and ripples left on the surface of water from a basin when precious stones are dropped. The sound of the dropping stones along with the ripples formed are then interpreted.

When oil is used, the oil is poured into the water and the shapes it forms are interpreted. For meditation, the water is gazed upon, invoking a self-hypnotic state for divination.