Double-edged, bifacially worked obsidian tool. Both edges are worked, but one of the edges seems a little too squared off to be used for cutting. The retouch seems to go all around the rounded edge as if the tool was the end fragment of a digging tool. Definitely too rounded and blunt to be a projectile. Cortex visible on 2/3 to 3/4 or dorsal surface.
Retouch: yes
Patination: