metamorphic
Quartzite Pebble
Metamorphic Quartzite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous to greasy luster, variable color with white quartz veins, and compact granular crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous to greasy luster, variable color with white quartz veins, and compact granular crystal structure.
Formation & geological history
Formed through the thermal or regional metamorphism of quartz-rich sandstone under intense heat and pressure over millions of years.
Uses & applications
Used in construction, as road aggregate, railroad ballast, and occasionally for decorative landscaping or lapidary work.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identify by its inability to be scratched by steel and lack of reaction to acid. Commonly found in riverbeds and coastal beaches.
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