metamorphic
Quartzite Pebble
Metamorphic Quartzite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, grayish-tan color, vitreous to dull luster, and granular crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, grayish-tan color, vitreous to dull luster, and granular crystal structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under high heat and pressure, often over millions of years.
Uses & applications
Used in construction, road aggregate, and decorative landscaping.
Geological facts
Quartzite is extremely resistant to weathering, which allows rounded pebbles to persist in riverbeds and beaches over long geological periods.
Field identification & locations
Identified by its high hardness that easily scratches glass and its lack of effervescence with acid; commonly found in stream beds and glacial deposits.
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