sedimentary
Chert (Flint)
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 6.5-7. Color: Grey, tan, or white with waxy luster. Conchoidal fracture. Cryptocrystalline structure. Specific gravity: 2.6.
- Hardness
- 6
- Color
- Grey, tan, or white with waxy luster
Identified More sedimentary →
Explore Chert (Flint) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7. Color: Grey, tan, or white with waxy luster. Conchoidal fracture. Cryptocrystalline structure. Specific gravity: 2.6.
Formation & geological history
Formed in marine environments through the precipitation of silica or the accumulation of siliceous organism remains like diatoms or radiolarians.
Uses & applications
Historically used for stone tools and weapons (arrowheads). Today used as a component in road construction and as a decorative landscaping rock.
Geological facts
Because it breaks with a conchoidal fracture, it creates sharp edges that made it the primary material for prehistoric survival tools.
Field identification & locations
Identify by its smooth, waxy surface and sharp, curved fracture patterns. It is extremely hard and will scratch glass easily.
More like this
Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary