metamorphic
Quartzite
Metamorphic Quartz Arenite
AI-generated identification · may be incorrectMohs hardness of 7, typically white to gray in color, vitreous luster, and non-foliated massive crystal structure.
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Physical properties
Mohs hardness of 7, typically white to gray in color, vitreous luster, and non-foliated massive crystal structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under high heat and pressure, often found in mountain-building belts.
Uses & applications
Used widely in construction, railroad ballast, crushed stone, and decorative landscaping.
Geological facts
Quartzite is extremely durable and weather-resistant, often forming prominent mountain ridges because it erodes slower than surrounding rocks.
Field identification & locations
Identify by its ability to scratch glass and lack of effervescence with acid; commonly found worldwide in ancient orogenic zones.
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