Jalpaite is a rare copper silver sulfide mineral with formula Ag<sub>3</sub>CuS<sub>2</sub>.
It was first described in 1858 for an occurrence in the Leonora Mine, Jalpa, Zacatecas, Mexico and named after the locality. It occurs in low temperature hydrothermal veins at temperatures less than . Associated minerals include acanthite, mckinstryite, galena, sphalerite, pyrite, chalcopyrite, stromeyerite, polybasite, pearceite, tetrahedriteâÂÂtennantite and native silver.