seligmannite

{{Infobox mineral | name = Seligmannite | category = Sulfide minerals | image = Seligmannite-217331.jpg | imagesize = | caption = Seligmannite from Palomo mine, Castrovirreyna Province, Huancavelica Department, Peru | formula = PbCuAsS3 | IMAsymbol = Seli | molweight = 441.87 g/mol | strunz = 2.GA.50 | system = Orthorhombic | class = Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) | symmetry = Pmmn | color = Lead gray to black | habit = Massive to crystalline | 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, US.