The Neolithic variscite mines of Gavà Historical milestone · Gavà, Baix Llobregat, Barcelona Image of Gavà, not of the place itself. Around the year 4000 BCE galleries were opened at Can Tintorer, in Gavà, to extract variscite, a green mineral used in necklaces that spread throughout the western Mediterranean. They are the oldest known mines in Europe. 4000 a. C. Photo: Pere López Brosa (CC BY-SA 4.0) What to see and do in Gavà