metamorphic

Quartzite

AI-generated identification · may be incorrect

Hardness of 7 on the Mohs scale, typically white to pale gray, but can be pink, red, or purple depending on impurities, glassy luster, granular texture, no cleavage, specific gravity of 2.65

Identified September 19, 2026More metamorphic →

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Physical properties

Hardness of 7 on the Mohs scale, typically white to pale gray, but can be pink, red, or purple depending on impurities, glassy luster, granular texture, no cleavage, specific gravity of 2.65

Formation & geological history

Forms from the metamorphism of pure quartz sandstone through heating and pressure, typically found in areas of regional metamorphism

Uses & applications

Used as decorative stone, crushed stone for road construction, and in the production of silica for various industrial applications

Geological facts

Quartzite is incredibly hard and resistant to chemical weathering, making it a durable material often used for countertops and flooring.

Field identification & locations

Can be identified by its granular texture and extreme hardness (will scratch glass). Often found in mountainous regions or areas with a history of tectonic activity. Look for its sugary appearance on broken surfaces.