Some crystals to 5cm have been found, the largest known for the species. Color is usually colorless, white or pale yellow on smaller crystals and white, pale to lemon-yellow, greenish yellow, very pale green and pale brown on the larger crystals. Luster is vitreous, resinous or greasy on broken surfaces. Crystal Habits include sharp simple tetrahedra often with minor modifications, randomly disseminated grains or small embedded masses. Cleavage none observed.
Fracture is conchoidal to uneven.
Hardness is 6. Streak is white. Associated Minerals include aegirine, albite, analcime, ancylite, astrophyllite, calcite, catapleiite, fluorite, leifite, microcline, polylithionite, pyrochlore, rhodochrosite, s randite, tetranatrolite and wurtzite.