It is very similar to several other species such as pectolite, cancrinite and revdite, and visual identification is impossible.
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.