Found this large chert bi face hand axe scraper portable rock art effigy on our Guthrie, OK property. It appears to be either from the Paleolithic or Paleo Indian era. It measures 7.5" x 6.5"
These notes were written by the person who submitted this item. Appraiser.AI has not verified them, and the AI's identification and estimate may rely on them.
AI Estimated Value
Not an official valuation
$50–$150
AI estimate as of August 22, 2026 · verify with a professional before acting
AI-Generated · Verify before acting
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This analysis also relies on unverified notes provided by the user, which may be incomplete or inaccurate and could affect the result.
This object is a substantial, irregularly shaped stone specimen displaying physical characteristics consistent with chert or a similar cryptocrystalline silica rock. The piece exhibits natural weathering, earth-toned coloration ranging from tan and beige to ochre, and various surface fractures, irregularities, and natural inclusions. It is photographed alongside a standard American Silver Eagle coin included for scale. There are no clearly discernible maker's marks, stamps, or human-crafted flaking patterns directly readable from the visual evidence provided to confirm intentional knapping or modification. The owner's notes state that this was found on a property in Guthrie, Oklahoma, user-attributed as a large chert biface hand axe, scraper, portable rock art, or effigy dating to the Paleolithic or Paleo Indian era, measuring approximately 7.5 inches by 6.5 inches. However, this user-supplied attribution is entirely unverified from the photograph alone, and without physical archaeological inspection, the item cannot be definitively categorized as a manufactured lithic tool or art object rather than a naturally occurring geological formation.
AI Appraisal Report
Based on what I can see in the provided photographs, this stone specimen exhibits characteristics consistent with a naturally occurring chert or cryptocrystalline silica rock, showing earth-toned coloration and surface irregularities. Per user submission, the owner identifies this as a large chert biface hand axe, scraper, portable rock art, or effigy originating from a property in Guthrie, Oklahoma, dating to the Paleolithic or Paleo Indian era, measuring approximately 7.5 by 6.5 inches. However, I cannot verify from a photo alone whether this object represents a manufactured prehistoric lithic tool, effigy, or merely a naturally weathered geological formation, as no clearly discernible, human-crafted flaking patterns or modification marks can be definitively observed. For the purposes of this assessment, I am providing a hypothetical market range of $300–$600 for an item of this type if the user's attribution as a Paleo Indian artifact is correct. Conversely, if physical inspection reveals the piece to be a natural geofact rather than a shaped artifact, the value would be negligible, typically limited to a nominal geological specimen value of $10–$25. General market demand for ancient lithics varies significantly based on documented provenance, material quality, and clear evidence of knapping. To properly evaluate and establish authenticity, this specimen would need physical archaeological inspection, expert in-person appraisal, and provenance documentation. Without physical handling and scientific testing to rule out natural geological weathering, any estimation remains speculative.
