Most characteristic chipped stone artifacts types from Hallan Cemi (e.g. scalene geometrics and projectile points) are all also present at Demirköy. Consistent with expectations about temporal trends, projectile points, are much more common at Demirköy than at Hallan Cemi. Sickle blades and lunate geometrics are also more common, although scalenes still constitute the largest part of the geometric component. However, the frequency of obsidian relative to flint drops at Demirköy (as compared to Hallan Cemi) from ca. 58% to ca. 9% by total count and ca. 32% to ca. 2% by total weight. 