“…Our analysis was conducted in the Laboratoire de Tribologie et Dynamique des Systèmes, Ecole Centrale de Lyon. Since 1996, this laboratory undertakes basic research on ancient stone technology in collaboration with CNRS and university archeologists (Anderson et al, 1998(Anderson et al, , 2006Astruc and Vargiolu, 2004;Astruc et al, 2001Astruc et al, , 2002Astruc et al, , 2003Morero et al, 2008;Procopiou et al, 1998;Vargiolu et al, 2007). …”