sedimentary
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
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 More 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.
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