metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale; white, gray, or yellowish color; vitreous luster; non-foliated crystal structure.
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Physical properties
Hardness of 7 on Mohs scale; white, gray, or yellowish color; vitreous luster; non-foliated crystal structure.
Formation & geological history
Formed when quartz-rich sandstone is subjected to high heat and pressure, typically during tectonic mountain-building events.
Uses & applications
Used in construction, railway ballast, and occasionally as decorative stone or in making crushed aggregate.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identify by its non-foliated texture and inability to be scratched by a knife; commonly found in mountainous regions worldwide.
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