sedimentary
Flint Arrowhead
Cryptocrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, dark gray to brown color, waxy to vitreous luster, and conchoidal fracture with no cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, dark gray to brown color, waxy to vitreous luster, and conchoidal fracture with no cleavage.
Formation & geological history
Formed through the replacement of limestone or chalk by silica-rich solutions in marine environments over millions of years, then human-shaped via flintknapping.
Uses & applications
Historically used as a sharp tool and weapon for hunting, and currently valued by artifact collectors and archaeologists.
Geological facts
Flint was crucial for early human survival due to its ability to hold a sharp edge and create sparks when struck against iron pyrite.
Field identification & locations
Identified by its distinctive conchoidal fracture ripples and human-modified pressure flakes, commonly found in regions with historical indigenous or prehistoric activity.
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