白榴石
Staurolite \Stau"ro*lite\, n. [Gr. ? a cross + -lite.] (Min.)
A mineral of a brown to black color occurring in prismatic
crystals, often twinned so as to form groups resembling a
cross. It is a silicate of aluminia and iron, and is
generally found imbedded in mica schist. Called also
{granatite}, and {grenatite}.