sedimentary

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (Chert/Flint)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Brown, tan, and dark gray; Luster: Waxy to dull; Structure: Cryptocrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.6-2.7

Hardness: 7 on Mohs scale
Color: Brown, tan, and dark gray
Luster: Waxy to dull

Identified July 13, 2026More sedimentary →

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Physical properties

Hardness: 7 on Mohs scale; Color: Brown, tan, and dark gray; Luster: Waxy to dull; Structure: Cryptocrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.6-2.7

Formation & geological history

Formed through the accumulation of silica-rich organic remains or chemical precipitation in sedimentary environments. As an artifact, it was created through flintknapping (pressure and percussion flaking) by prehistoric humans.

Uses & applications

Originally used as a hunting tool or weapon. Currently valued as an archaeological artifact and for private collections.

Geological facts

This specimen shows clear evidence of human modification, including a notched base and retouching along the edges. Chert is chosen for tools because its conchoidal fracture creates razor-sharp edges.

Field identification & locations

Can be identified by the visible flake scars and intentional symmetry. Often found in riverbeds, tilled fields, or archaeological sites where early populations settled. Artifacts should be documented and handled according to local salvage laws.