Color is usually colorless. Luster is vitreous. Diaphaneity is transparent. Crystal Habits include irregular grains and embedded crystalline masses to 6mm.
Fracture is conchoidal.
Hardness is 5.5 - 6. Streak is white. Associated Minerals include aegirine, albite, amphibole group, analcime, chabazite, epistolite, eudialyte, gmelinite, magnesio- arfvedsonite, sodalite, steenstrupine, tetranatrolite and zircon.