Wiktionary
seligmannite
n. (context mineralogy English) An orthorhombic-dipyramidal rose white mineral containing arsenic, copper, lead, and sulfur.
Wikipedia
Seligmannite
Seligmanite is a rare mineral, with the chemical formula PbCuAsS. 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.