from The Century Dictionary and Cyclopedia
- n. A kind of clay or fine-grained silicate of alumina from the coal-formation of Planitz in Saxony, formerly supposed to possess valuable medicinal properties, whence it had its ancient name of terra miraculosa Saxoniæ. Also called lithomarge. Sometimes erroneously spelled terratolite, as if from Latin terra, earth.
Sorry, no etymologies found.