Its tunnels, hand-dug into the compact Miocene evaporite, were connected to vertical shafts and ventilation ducts, while outside, the calcheroni and burning Gill furnaces made it possible to separate the raw sulfur from impurities, using as fuel the same gypsum extracted from the nearby quarries.
Oral testimonies collected by local associations recount the work of the carusi, the young porters who, along steep descents, carried slabs of mineral down to the drying areas — a daily ritual that combined hard labor with a deep sense of community solidarity.