Color is usually colorless or pale green. Luster is vitreous. Diaphaneity is transparent to translucent. Crystal Habits include prismatic crystals to 3mm.
Fracture is uneven.
Hardness is 5 - 6. Streak is white. Associated Minerals include aegirine, albite, amphibole group, analcime, ancylite, arfvedsonite, calcite, diopside, fluorite, microcline, pectolite, quartz, sodalite, tainiolite and tetranatrolite.