crystallomancy|ˈkrɪstələʊˌmænsɪ| [f. as prec. + -mancy.] Divination by means of a crystal. 1613Purchas Pilgrimage iv. v. 310 Crystallomancie, in Crystall.1652Gaule Magastrom. 165. 1855 Smedley Occult Sci. 322 Crystallomancy may be understood to include every variety of divination by means of transparent bodies.