Color is usually bright orange to orange-brown or reddish brown. Luster is vitreous to adamantine. Diaphaneity is transparent to translucent. Crystal Habits include sharp trapezohedrons to 10mm.
Fracture is subconchoidal.
Hardness is 7. Streak is white. Associated Minerals include albite, allanite, calcite, epidote, fluorite, microcline, molybdenite, prehnite, pyroxene group, pyrrhotite and titanite.