It cannot be distinguished visually from astrophyllite. Color is usually bronze-yellow. Luster is vitreous to submetallic. Diaphaneity is transparent to opaque. Crystal Habits include tabular crystals to 3mm, acicular crystals, and micaceous or fibrous masses.
Fracture is uneven.
Hardness is approximately 4. Streak is brown. Associated Minerals include aegirine, albite, ancylite, arfvedsonite, calcite, eudialyte, fluorite, microcline and natrolite.