Although similar techniques were used to create all of the Neolithic skulls (such as the removal of the mandible), there are regional differences among them. For instance, the skulls from Jericho use shells for eyes; some of the shells were even broken in half before being applied, thus creating the effect of an iris and pupil. Whereas most skulls only show the cranium or visage, skulls found at Tell Ramad in Syria (shown here) also had necks represented.