Color is usually white. Luster is vitreous to resinous. Diaphaneity is transparent to translucent. Crystal System is orthorhombic, Fddd . Crystal Habits include powdery masses.
Fracture is uneven to hackly.
Hardness is 2.5 - 3. Streak is white. Associated Minerals include calcite, kogarkoite, pectolite and shortite.