Works of "Research Collection"
Place Collected: Challacolla Mine
Place Collected: Zapallar mining district
Place Collected: El Salvador Mine
Place Collected: Moquegua
Place Collected: Rodesia Mine
Place Collected: Candelaria Mine
Place Collected: Pachapaqui Mine near Chiquian in Pachapaqui district
Place Collected: Challacolla Mine
Place Collected: Manto de Tres Gracias Mine
Place Collected: Manto Cuba Mine
Place Collected: Manto Cuba Mine
Place Collected: Manto Cuba Mine