sedimentary

Chert Arrowhead

Cryptocrystalline Quartz (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Reddish-brown with waxy luster; Cleavage: None (conchoidal fracture); Opaque to translucent.

Hardness: 6
Color: Reddish-brown with waxy luster

Identified July 5, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Reddish-brown with waxy luster; Cleavage: None (conchoidal fracture); Opaque to translucent.

Formation & geological history

Formed as a chemical sedimentary rock from the precipitation of silica-rich fluids in limestone or oceanic environments. This specimen has been anthropogenically modified through knapping.

Uses & applications

Historically used as a projectile point for hunting. Currently high value as an archaeological artifact or collector's item.

Geological facts

Arrowheads made of chert or flint can remain sharp for thousands of years. The process of making them is called flintknapping and relies on the predictable conchoidal fracture of the stone.

Field identification & locations

Identification is based on the notched base, triangular shape, and 'flake scars' from pressure flaking. Found in sites of ancient human activity, often near riverbanks or sources of high-quality stone.