metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white to grey or pinkish, vitreous luster, and non-foliated massive structure.
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Physical properties
Hardness of 7 on the Mohs scale, typically white to grey or pinkish, vitreous luster, and non-foliated massive structure.
Formation & geological history
Formed under high heat and pressure from quartz-rich sandstone during regional or contact metamorphism.
Uses & applications
Used widely in construction, as crushed stone for road bases, and occasionally for decorative stone and countertops.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identify by its ability to scratch glass and lack of effervescence with acid; commonly found worldwide in ancient mountain belts.
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