sedimentary
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness: 7 Mohs; Color: Grayish-brown; Luster: Dull to waxy; Structure: Cryptocrystalline; predictable conchoidal fracture patterns used for tool making.
- Hardness
- 7 Mohs
- Color
- Grayish-brown
- Luster
- Dull to waxy
Identified More sedimentary →
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Physical properties
Hardness: 7 Mohs; Color: Grayish-brown; Luster: Dull to waxy; Structure: Cryptocrystalline; predictable conchoidal fracture patterns used for tool making.
Formation & geological history
Formed as nodules or beds in limestone or other sedimentary rocks through the precipitation of silica. This specimen has been anthropogenically shaped by knapping during the prehistoric period.
Uses & applications
Historically used for hunting and defense; currently high value for archaeological study and private collection.
Geological facts
While naturally a rock, this is a lithic artifact. The 'flakes' removed from the surface to create the point are a tell-tale sign of human craftsmanship known as 'knapping'.
Field identification & locations
Check for symmetrical shaping and 'scalloped' edges resulting from pressure flaking. Found globally in areas of ancient human habitation.
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