'''Schist''' is a [[metamorphic rock]], characterized by its tendency to break easily into sheets due to the high [[mica]] content of the [[rock]]. It usually forms from [[slate]]. Since ancient times, schists have been used for [[arrowhead]]s, and other cutting implements. | '''Schist''' is a [[metamorphic rock]], characterized by its tendency to break easily into sheets due to the high [[mica]] content of the [[rock]]. It usually forms from [[slate]]. Since ancient times, schists have been used for [[arrowhead]]s, and other cutting implements. |