sedimentary
Chert Arrowhead (Lithic Artifact)
Chert (Cryptocrystalline Quartz, SiO2)
Hardness: 7 (Mohs scale); Color: Gray, tan, and bluish-white; Luster: Waxy to vitreous; Structure: Cryptocrystalline; Cleavage: None (conchoidal fracture); High durability.
- Hardness
- 7 (Mohs scale)
- Color
- Gray, tan, and bluish-white
- Luster
- Waxy to vitreous
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Physical properties
Hardness: 7 (Mohs scale); Color: Gray, tan, and bluish-white; Luster: Waxy to vitreous; Structure: Cryptocrystalline; Cleavage: None (conchoidal fracture); High durability.
Formation & geological history
Formed as a sedimentary rock through the accumulation of silica-rich organisms or chemical precipitation in limestone. This specific piece has been anthropogenically modified through knapping.
Uses & applications
Historically used for hunting and tools; currently valued as an archaeological artifact and for hobbyist collecting.
Geological facts
While naturally occurring as chert, this specimen is a 'lithic artifact.' The notches and flaking indicate it was shaped by humans, likely as a projectile point or knife.
Field identification & locations
Identified by the distinct shell-like conchoidal fracture scars and intentional serration/notching. Common in areas with limestone outcrops. Collect cautiously following local antiquity laws.
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