Color is usually pale brass-yellow. Luster is metallic. Diaphaneity is opaque. Crystal Habits include thin bladed single crystals to 2-3mm and oriented crystal groups.
Fracture is uneven.
Hardness is 6 - 6.5. Streak is gray to black. Associated Minerals include Albite, analcime, calcite, dawsonite, fluorite, ilmenite, magnesite, muscovite, pyrite, pyrrhotite and quartz.