Class : Sulfides and Sulfosalts
    Subclass : Sulfosalts
    Crystal system : Orthorhombic
    Chemistry : PbCuAsS₃
    Rarity : Rare

Seligmannite is a rare lead and copper sulfosalt that is in a series with bournonite, its antimony equivalent. Much less common than the latter, it is found in low and medium temperature hydrothermal deposits, commonly associated with pyrite, sphalerite and tennantite. It was named in honor of the German Gustav Seligmann, a mineral collector. Seligmannite is a lead gray to black mineral that forms equant, short prismatic or tabular crystals, up to 2 cm ; it constantly shows polysynthetic twins, clearly visible under the microscope.

Main photo : Seligmannite from Lengenbach, Binn, Valais, Switzerland © Stephan Wolfsried

Twinning on {110} is very common and can form crosses, commonly polysynthetic.

No fakes listed for this mineral species.