metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white, gray, or pinkish with a vitreous to greasy luster, non-foliated massive structure.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, gray, or pinkish with a vitreous to greasy luster, non-foliated massive structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure deep within the Earth's crust.
Uses & applications
Used widely in construction for road aggregates, railway ballast, dimension stone, and in manufacturing ferrosilicon.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identified by its hard, sugary texture that does not fizz with acid and scratches glass easily; found globally in mountainous regions.
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