metamorphic
Quartzite
Metamorphic Quartz Arenite
AI-generated identification · may be incorrectMohs hardness 7; colors range from white to gray, pink, and yellow; vitreous luster; non-foliated massive crystal structure.
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Physical properties
Mohs hardness 7; colors range from white to gray, pink, and yellow; vitreous luster; non-foliated massive crystal structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure, commonly over millions of years.
Uses & applications
Used extensively in construction, railway ballast, decorative aggregates, and occasionally as dimension stone.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identify in the field by its sugary texture on broken surfaces and inability to be scratched by a knife; found globally.
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