mineral

Red jasper flint/chert knapped point

Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide coloration

AI-generated identification · may be incorrect

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.

Identified August 30, 2026More mineral →

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Physical properties

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.