metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and typically white to gray or pinkish in color.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and typically white to gray or pinkish in color.
Formation & geological history
Formed from quartz-rich sandstone subjected to intense heat and pressure during tectonic metamorphism.
Uses & applications
Used widely in construction for countertops, decorative aggregates, roofing, and railroad ballast.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identified easily by its inability to be scratched by glass and its lack of effervescence with acid; found globally in ancient mountain belts.
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