sedimentary

Flint or chert projectile point

Microcrystalline quartz (SiO₂), likely chalcedony-rich chert

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque cream to white with reddish-brown staining, waxy to dull luster, and no visible cleavage. The bifacial flaking and pointed shape indicate a knapped stone tool rather than a naturally formed crystal.

Identified August 30, 2026More sedimentary →

Explore Flint or chert projectile point in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Flint or chert projectile point
Scientific name: Microcrystalline quartz (SiO₂), likely chalcedony-rich chert
Category: sedimentary
Identified: August 30, 2026
Method: Standard

AI Estimated Value

Common modern reproductions: $5–$30; authentic, legally documented prehistoric points: roughly $25–$500+, with exceptional provenance or craftsmanship worth much more.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Chert forms when microcrystalline silica replaces or accumulates in sedimentary rocks, commonly limestone; its geological age varies widely. This specimen was human-shaped by pressure flaking, probably in a prehistoric period, but its exact cultural age cannot be determined from the image.

Uses & applications

Originally used as a hunting projectile or cutting tool; today it has archaeological, educational, and collectible value. It is not typically used as jewelry or construction stone in this shaped form.

Geological facts

The flake scars and serrated margins are characteristic of intentional knapping. Cream chert is often called flint informally, though true flint is generally dark gray to black.

Field identification & locations

Common in archaeological contexts worldwide, especially regions with abundant chert-bearing limestone; North American examples occur throughout the Midwest, Plains, and Southwest. Avoid cleaning or altering it, since surface details may be archaeologically important.