Color is usually white or beige. Luster is adamantine. Diaphaneity is transparent to translucent. Crystal Habits include minute needles.
Fracture is conchoidal to uneven.
Hardness is 3.5 - 4. Streak is white. Associated Minerals include aegirine, anglesite, arsenopyrite, beudantite, hemimorphite, hydrocerussite, microcline, muscovite, natrolite, pyrite, pyrrhotite, sphalerite and tetranatrolite.