Most of the more exotic minerals from this site are arsenic sulfides and sulfosalts like baumhauerite. Baumhauerite is usually a bright dark gray mineral with a nice luster and striated prismatic crystals embedded in a dolomitic marble. It is a rare mineral and is only found in a few localities. Lengenbach is the only locality where specimens can be found with regularity. Luster is metallic to dull.
Crystals are opaque.
Hardness is 3. Streak is dark brown. Associated Minerals include dolomite , realgar and sartorite . Best Field Indicators are crystal habit, locality, internal reflections, associations and density.