Halomancy
Halomancy — synonym of alomancy, from Greek háls, salt. Divination by salt patterns: when thrown, poured, dissolved or sprinkled into fire. Practice in medieval European folklore and Afro-diasporic traditions.
Methods
Throw coarse salt onto dark cloth, pour fine salt onto damp surface, dissolve in water, sprinkle into fire — interpret patterns, speed, sound, color.