metamorphic
Quartzite
Metamorphic Quartz Arenite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, colors ranging from white to pink and gray, vitreous to greasy luster, and a non-foliated granular crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, colors ranging from white to pink and gray, vitreous to greasy luster, and a non-foliated granular crystal structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone subjected to intense heat and tectonic pressure deep within the Earth's crust.
Uses & applications
Widely used in construction, railroad ballast, decorative aggregates, and as a durable facing stone.
Geological facts
Quartzite is extremely resistant to weathering and often forms prominent ridge lines in mountain ranges.
Field identification & locations
Identified by its inability to be scratched by a knife and its failure to fizz with acid; commonly found in mountainous regions globally.
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