sedimentary
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness: 7 Mohs scale; Color: Reddish-brown with tan inclusions; Luster: Waxy to vitreous; Crystal Structure: Microcrystalline; Cleavage: None (conchoidal fracture).
- Hardness
- 7 Mohs scale
- Color
- Reddish-brown with tan inclusions
- Luster
- Waxy to vitreous
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Physical properties
Hardness: 7 Mohs scale; Color: Reddish-brown with tan inclusions; Luster: Waxy to vitreous; Crystal Structure: Microcrystalline; Cleavage: None (conchoidal fracture).
Formation & geological history
Formed via the accumulation of siliceous remains of marine organisms or through chemical precipitation in limestone/dolomite. This specimen was anthropogenically worked into an arrowhead.
Uses & applications
Historically used as a projectile point for hunting; today it serves as a valuable archaeological artifact and collector's item.
Geological facts
Chert and flint were preferred by prehistoric peoples worldwide because they break with extremely sharp edges through a process known as knapping.
Field identification & locations
Identified by its triangular shape, flaked edges (scars from pressure flaking), and conchoidal fracture patterns. Found in archaeological sites and riverbeds in limestone-rich areas.
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