Seligmannite

{{Infobox mineral | name = Seligmannite | category = Sulfide Mineral | boxwidth = | boxbgcolor = | image = | imagesize = | caption = | formula = PbCuAsS₃ | molweight = 441.87 gm | color = Lead gray to black | habit = Massive to Crystaline | system = Orthorhombic - Dipyramidal | twinning = on {110} very common | cleavage = Indistinct on the {001}, {100}, and {010} | fracture = Conchoidal | tenacity = Brittle | mohs = 3 | luster = Metallic | polish = | refractive = | opticalprop = Anisotropic | birefringence = | dispersion = | pleochroism = | fluorescence= | absorption = | streak = Black to chocolate brown | gravity = | density = 5.38 - 5.44 g/cm₃ | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = | other = | references = }}

Seligmanite is a rare mineral, with the chemical formula PbCuAsS₃. Originally described from the Lengenbach Quarry, Valais Canton, Switzerland; it has also been found in the Raura district, Lima Region, Peru; at Tsumeb, Oshikoto Region, Namibia; and at the Sterling Mine, Sussex County, New Jersey, USA.

References