metamorphic
Quartzite Pebble
Metamorphic Quartzite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and composed primarily of interlocking quartz grains.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and composed primarily of interlocking quartz grains.
Formation & geological history
Formed through the thermal or regional metamorphism of quartz-rich sandstone under high temperatures and pressures.
Uses & applications
Used in construction, railroad ballast, crushed stone for road surfaces, and occasionally as decorative landscaping stones.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identified by its inability to be scratched by steel and lack of effervescence with acid; found worldwide in ancient mountain belts.
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