 &lt;em&gt;Flake&lt;/em&gt;, ca. 4400-3100 B.C.E., or much earlier. Gray chert, 1 3/4 x 6 in. (4.4 x 15.2 cm). Brooklyn Museum, Charles Edwin Wilbour Fund, 07.447.871. Creative Commons-BY (Photo: , CUR.07.447.871_NegE_print_cropped_bw.jpg)