Color is usually colorless to white. Luster is greasy. Diaphaneity is transparent to translucent. Crystal Habits include sharp pseudo-octahedral crystal to 2mm. Cleavage none distinct.
Fracture is uneven.
Hardness is 2.5. Streak is white. Associated Minerals include aegirine, chabazite, eudialyte, lovozerite, natrolite, sodalite and villiaumite.