sedimentary

Chert Arrowhead

Microcrystalline Quartz (SiO2)

Hardness: 6.5-7 Mohs. Color: Cream to light tan. Luster: Dull to waxy. Structure: Cryptocrystalline. Conchoidal fracture with sharp flake scars.

Hardness: 6
Color: Cream to light tan
Luster: Dull to waxy

Identified May 28, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 Mohs. Color: Cream to light tan. Luster: Dull to waxy. Structure: Cryptocrystalline. Conchoidal fracture with sharp flake scars.

Formation & geological history

Formed via precipitation of silica in limestone or chalk beds. This specimen was anthropogenically worked via flintknapping into a projectile point, likely during a prehistoric period.

Uses & applications

Historically used for hunting and self-defense. Today, it is used for archaeological study and as a collectible geological/historical artifact.

Geological facts

Chert is one of the first materials used by humans to create sharp tools. This specific type of cream-colored chert is common in many North American lithic assemblages.

Field identification & locations

Identified by systematic flaking (pressure and percussion scars), a symmetrical shape, and a basally-notched stem. Common in riverbeds or tilled fields in limestone-rich regions.