mineral
Red jasper flint/chert knapped point
Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide coloration
AI-generated identification · may be incorrectOpaque brick-red to brown, vitreous-to-waxy luster, conchoidal fracture, no visible cleavage; Mohs hardness about 6.5–7 and specific gravity about 2.6. The flaked edges and percussion scars indicate intentional knapping or shaping.
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Physical properties
Opaque brick-red to brown, vitreous-to-waxy luster, conchoidal fracture, no visible cleavage; Mohs hardness about 6.5–7 and specific gravity about 2.6. The flaked edges and percussion scars indicate intentional knapping or shaping.
Formation & geological history
Silica-rich sedimentary chert formed when cryptocrystalline quartz replaced marine or chemically deposited sediments; iron oxides produced the red color. Chert deposits range from Paleozoic to Cenozoic, while this worked specimen’s cultural age cannot be determined from the image.
Uses & applications
Used historically for cutting tools, projectile points, fire-starting, and scraping; today commonly sold as an archaeological-style replica, craft stone, or collector specimen.
Geological facts
Its sharp conchoidal edges are characteristic of flint-knapping, and the material may be called jasper, red flint, or red chert depending on texture and locality.
Field identification & locations
Identify by red opaque color, hardness, glassy/waxy surface, and curved flake scars; common sources include Texas, Oklahoma, Arkansas, Mexico, and Europe. Avoid assuming it is genuinely ancient without documented provenance.
