A stone that saves one from the plague and lightening, strengthens the heart, brings wealth, honor, prudence and wisdom. It was recommended by Albertus Magnus as a soporific on account of its coldness, and was ordered by Pselius in cases of coughs, ruptures, and melancholy, to be drunk with vinegar. Others also described the wonderful properties of this stone. A.G.H.
Spence, Lewis, An Encyclopedia of Occultism, New York, Carol Publishing Group Edition, 1996, p. 234