metamorphic
Quartzite
Quartzite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale. Colors can range from white to gray, pink, or red. Granular texture, glassy luster. High quartz content.
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Physical properties
Hardness of 7 on the Mohs scale. Colors can range from white to gray, pink, or red. Granular texture, glassy luster. High quartz content.
Formation & geological history
Forms from the metamorphism of sandstone under high heat and pressure, typically in tectonic environments.
Uses & applications
Used in construction, as decorative stone, and sometimes for road surfaces. Also collected by rockhounds.
Geological facts
Quartzite is very resistant to weathering and often forms ridges and hilltops in mountainous areas.
Field identification & locations
Identify by its hardness (scratches glass) and granular, sugary appearance when broken. Often found as rounded river cobbles.
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