metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and typically white, gray, or reddish hues.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and typically white, gray, or reddish hues.
Formation & geological history
Formed from quartz-rich sandstone subjected to high temperatures and pressures during tectonic metamorphism.
Uses & applications
Used widely in construction, decorative aggregates, roofing, and manufacture of silica bricks.
Geological facts
Extremely resistant to weathering, quartzite ridges often form prominent mountain summits and ridges.
Field identification & locations
Identified by its inability to be scratched by steel and lack of acid reaction; commonly found globally in ancient mountain belts.
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