Often some of the original lithiophyllite is still present in most purpurite specimens. The purple color or purpurite is truly unique in the mineral rainbow. Luster is vitreous to sub-metallic. Crystals are translucent to opaque. Cleavage is good in one and poor in another direction.
Fracture is uneven.
Hardness is 4 - 4.5. Streak is deep red to purple. Brown coatings can be removed by weak acid baths that can also bring out more purple color. Associated Minerals are lithiophyllite , heterosite , quartz and feldspars . Best Field Indicators are color, associations, lack of crystals and luster.