Color ranges from beige, pale gray and pale blue on larger crystals and usually colorless on smaller crystals. Luster is dull to greasy. Diaphaneity is transparent in smaller crystals, translucent to opaque on larger crystals.
Fracture is conchoidal to uneven.
Streak is white. Associated Minerals include aegirine, albite, analcime, ancylite, catapleiite, fluorite, mangan-neptunite, microcline, polylithionite, rhodochrosite and sphalerite.