It bears very close ressemblance to pectolite and is easily overlooked.
Color is usually white to colorless.
Luster is vitreous to silky to dull. Diaphaneity is translucent to opaque. Crystal Habits include aggregates of crude hexagonal prisms to 3mm on pectolite. Fracture is conchoidal to uneven. Hardness is 5.5 - 6.