Saponite
an amorphous mineral occurring as nodules, or filling crevices, and forming amygdules in igneous rocks; soft, but brittle when dry; color, various; composition: essentially a hydrated silicate of magnesia and alumina. Also a clay resembling soap, occurring in the granite of the hot springs of Plombières, France.
SAPOR I., or SHAHPUR, a Persian king who reigned A. D. 240-272. He belonged to the dynasty of the Sassanidæ, which ruled Persia for about 400 years. Sapor's most noteworthy achievement was his successful war with the Romans, in which he defeated, took captive, and put to death the Emperor Valerian. (A. D. 260).