AI Appraisal Estimate

This is a prehistoric lithic tool, specifically a stone scraper or point preform, measuring approximately 3.5 inches by 2 inches. The item is crafted from a light-colored, possibly creamy-tan or off-white chert or flint, characteristic of materials commonly found in the Oklahoma region. Its construction shows evidence of intentional percussion flaking along the edges to create a sharp, functional working surface. The piece exhibits a triangular to sub-rectangular morphology with a thick cross-section, suggesting it may have served as a heavy-duty processing tool for hides or woodworking. The surface displays a distinct patina and mineral staining consistent with long-term burial in soil, particularly visible in the recessed flaked areas. While the edges show some ancient wear and minor modern crushing or chippage, the integrity of the tool remains largely intact. There are no modern maker's marks or signatures, as is typical for an artifact of this age, which likely dates to the Archaic or Woodland period. The craftsmanship reflects an expedient but effective knapping technique, prioritizing function over aesthetic refinement. The find location of Guthrie, Oklahoma, adds significant provenance, situating the piece within the historical context of Native American lithic industries in the Great Plains.

Based on my examination of the provided documentation and imagery, I have evaluated this lithic artifact found in Guthrie, Oklahoma. The piece is a chert scraper or preform, likely dating to the Archaic Period (8000–1000 BCE). My visual inspection confirms the presence of bifacial percussion flaking and marginal retouch consistent with prehistoric stone tool manufacture. The creamy-tan chert is typical of local lithic sources such as Kay County or Keokuk cherts. The patina and mineral staining appear deep-seated and consistent with long-term deposition in North American soil, which supports its authenticity; however, some localized crushing on the edges may indicate more recent post-depositional impact ('plow scars'). From a market perspective, expedient tools like scrapers and preforms are significantly more common than highly refined diagnostic projectile points (e.g., Clovis or Folsom). Consequently, the market for such items is stable but localized. Collectors value the provenance of a Guthrie find, yet the lack of fine pressure flaking or a specific 'type' designation (like a Scallorn or Gary point) limits its ceiling. Comparable sales of unauthenticated Great Plains lithic tools of this size generally fall within the $40–$80 range. This valuation assumes the piece has not been modernly 're-chipped.' Importantly, a definitive authentication cannot be made via photographs alone. A full professional certification would require an in-person microscopic analysis of the 'use-wear' patterns and hydration layers to differentiate ancient flake scars from modern 'grey-market' replicas. For a formal provenance record, I recommend documenting the specific township or land-tract history where the item was unearthed.