sedimentary
Flint
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, waxy luster, conchoidal fracture, and typically brown or grey color.
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Physical properties
Hardness of 7 on the Mohs scale, waxy luster, conchoidal fracture, and typically brown or grey color.
Formation & geological history
Formed through the chemical replacement of limestone or chalk by silica-rich solutions in marine environments over millions of years.
Uses & applications
Historically used for making stone tools and starting fires; currently used in decorative landscaping and occasionally as a gemstone.
Geological facts
Flint was crucial for human survival in the Stone Age due to its ability to be chipped into extremely sharp edges.
Field identification & locations
Identified easily by its conchoidal fracture and waxy luster; commonly found embedded in chalk and limestone deposits worldwide.
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