Color is usually colorless. Luster is adamantine. Diaphaneity is transparent to translucent, and opaque. Crystal Habits include radiating groups of prismatic crystals to 1.5mm long, tabular grains and anhedral grains. Cleavage none observed.
Fracture is conchoidal to uneven.
Hardness is approximately 5. Streak is brown. Associated Minerals include aegirine, analcime, astrophyllite, biotite, calcite, fluorite, monazite, pectolite, sodalite and zircon.