Reproduction of a burial site in the Neolithic Gava Mines, Barcelona, Catalonia, Spain. The Gava Mines are a prehistoric site where variscite (semi-precious mineral) was mined between 4200 and 3400 BCE. As chambers of the mine were exhausted, they were repurposed as tombs such as this. Bodies were found in such chambers in the foetal position buried alongside tools, ornaments and jewellery. Tombs such as this one, deeper in the mines and sealed with stone doors, may have been for people with relatively high social status.