Jasper prevents fever and dropsy, strengthens the brain, and promotes eloquence; it is a preservative against defluxions, the nightmare, and epilepsy. The stone, also, has curative properties for stomach disorders, and nervousness. It is often met in the east with a counter charm. Marbodaeus mentions seventeen species of this stone, but that “like the emerald” is most noted for its magical virtues. (see Gem Healing) A.G.H.