sedimentary

Chert / Flint (Artifact)

Microcrystalline Quartz (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale. Color: Gray, brown, and weathered patinas. Luster: Vitreous to dull. Crystal structure: Cryptocrystalline (microscopic quartz crystals). Fracture: Conchoidal.

Hardness: 7 on Mohs scale
Color: Gray, brown, and weathered patinas
Luster: Vitreous to dull

Identified August 1, 2026More sedimentary →

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Physical properties

Hardness: 7 on Mohs scale. Color: Gray, brown, and weathered patinas. Luster: Vitreous to dull. Crystal structure: Cryptocrystalline (microscopic quartz crystals). Fracture: Conchoidal.

Formation & geological history

Formed through the chemical precipitation of silica-rich fluids in marine environments or the replacement of limestone/chalk over millions of years.

Uses & applications

Historically used by indigenous peoples for creating sharpened stone tools such as projectile points, scrapers, and blades.

Geological facts

This specimen appears to be a small lithic artifact or debitage showing intentional pressure flaking or shaping along the edges, making it of archaeological interest.

Field identification & locations

Identify by its conchoidal fracture, sharp edges when flaked, and waxy luster. Commonly found in sedimentary rock formations worldwide, particularly chalk and limestone beds.