Spherical aggregate of 1mm in sodalite Photo by Dr. Jaszczak.
Color is usually lead gray.
Luster is metallic. Diaphaneity is opaque. Crystal Habits include sharp hexagonal, thin-foil plates forming attractive rosettes or spherical aggregates, embedded masses and hollow, cylindrical tubes to 5mm and 0.2mm in diameter. Fracture is not apparent. Streak is greenish.