Of course the structure may be very different. Color is bronze yellow or dark brown to pink. Luster is vitreous to waxy. Twinning is common and crystals are found doubly terminated. Cleavage is not observed.
Fracture is conchoidal.
Hardness is 4 or better. Streak is white. Associated Minerals are gaidonnayite , mangan-neptunite , nenadkevichite , quartz , microcline , albite , calcite , pyrite , galena , sphalerite , polylithionite , rhodochrosite , elpidite , catapleiite , chlorite , goethite , epididymite , zircon , analcime , natrolite , fluorite , eudialyte , ancylite and aegirine . Notable Occurrence is limited to Mont Saint-Hilaire , Quebec, Canada.