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, non-foliated, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white to grey or pinkish, vitreous luster, non-foliated, specific gravity of 2.65.
Formation & geological history
Formed from quartz-rich sandstone subjected to high heat and pressure during tectonic metamorphism over millions of years.
Uses & applications
Used in construction, railroad ballast, decorative aggregates, and the manufacturing of glass and refractory bricks.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identified by its inability to be scratched by a steel knife and lack of effervescence with acid; found worldwide in ancient mountain belts.
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