These two artifacts appear to be scavenged dart points (Refugio on left, Tortugas on right) that were resharpened long after they were first discarded. Notice that on both specimens, the right-hand edges look darker. Resharpening flakes along these edges reveal the darker, “fresh,” unpatinated color of the original material. In contrast, most of the surfaces are patinated (lighter in color due to weathering over time). This “differential patination” is a tell-tale pattern of two different periods reuse that were probably separated by many hundreds of years. Riley Collection, Frio County, TARL.