Antiphates
A shining black stone, used as a defence against witchcraft.
Antracites, or Antrachas, or Anthrax: A stone, sparkling like fire, supposed by Albertus Magnus to be the carbuncle. It cures " imposthumes." It is girdled with a white vein. If smeared with oil it loses its colour, but sparkles the more for being dipped in water.