Luster is vitreous to adamantine. Transparency crystals are transparent to translucent. Crystal System is Orthorhombic. Crystal Habits include striated crystals that are prismatic to acicular with sharply pointed terminations. Cleavage is almost indiscernible in one direction.
Fracture is uneven.
Streak is white. Crystals are striated with distinctive V-shapes on prism faces and crystals are brittle unlike those of the closely related paralaurionite. Associated Minerals include fiedlerite , cerussite , penfieldite , matlockite , phosgenite and paralaurionite. Best Field Indicators are crystal habit, associations, striations, brittleness and localities.