Among these there was also the "Società Nazionale per la coltivazione di miniere in Sardegna" of Genua that tried in vain to achieve general concession.
Since 1850 limited groups of specialised workers from Styria, Austria, followed by German miners from Freiburg began to settle temporarily in the Iglesiente in particular in the mining areas of Monte Vecchio, Guspini and Ingurtosu .