Our flagship quarry of Stone Group International and Birros Hellenic Marble SA is Pirgon, where 5 types of the wellknown Pirgon white marble are extracted (Pirgon Nivatus, Pirgon Ebru Arabesque, Pirgon Mist, Pirgon Alas και Pirgon Delta) Τhe total number of employees occupied to our quarries, exceeds 300. Privately owned quarries: