Though it easy to determine that it is an amphibole, it is very difficult to distinguish from other amphiboles. Color is usually greenish brown. Luster is vitreous. Diaphaneity is translucent. Crystal Habits include black prisms to several millimeters.
Fracture is uneven to subconchoidal.
Hardness is 5 - 6. Streak is grayish-green. Associated Minerals include amphibole group, analcime, biotite and pyrite.