Wiktionary
algodonite
n. (context mineral English) A hexagonal copper arsenide mineral.
Wikipedia
Algodonite
Algodonite is a copper arsenide mineral with formula: CuAs. It is a gray white metallic mineral crystallizing in the hexagonal system. It has a Mohs hardness of 4 and a specific gravity of 8.38 - 8.72.
It was first described in 1857 from the Algodones silver mine, Coquimbo, Chile.