Color is pink to reddish pink and off white. Luster is vitreous to silky. Transparency crystals are transparent to translucent. Also massive and compact. Cleavage is perfect in two directions at close to right angles.
Fracture is splintery due to the cleavage.
Streak is white. Associated Minerals include calcite , analcime , vesuvianite , grossular garnet and many extremely rare minerals. Notable Occurrences include the famous mines at St. Hilaire, Quebec, Canada and Roma Island, Los Islands, Guinea. Best Field Indicators are crystal habit, color, luster, associations, locality and cleavage.