Color is green to yellow-green or yellow. Luster is resinous. Crystals are transparent to translucent. Crystal System is monoclinic. Crystal Habits include tabular crystals, radiating fibrous, granular and massive crusts.
Cleavage is absent.
Fracture is uneven. Streak is green. Associated Minerals are duftite , mimetite , quartz , bindheimite , cerussite , wulfenite , mimetite , azurite and limonite . Best Field Indicators are color, crystal habit, streak, lack of cleavage, density, locality and associations.