Luster is vitreous to resinous. Diaphaneity is transparent to translucent, opaque on larger crystals.
Fracture is uneven to subconchoidal.
Hardness is 6 - 7. Streak is white. Associated Minerals include aegirine, analcime, andradite, apophyllite series, biotite, calcite, fluorite, grossular, microcline, molybdenite, natrolite, pectolite, pyrite and sodalite.