metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, compact crystalline structure, and conchoidal fracture. Displays white to grey coloration with distinct banding.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, compact crystalline structure, and conchoidal fracture. Displays white to grey coloration with distinct banding.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure over millions of years.
Uses & applications
Used in construction, as crushed stone for roads, for railroad ballast, and occasionally in decorative masonry.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Can be identified by its inability to be scratched by steel and its lack of effervescence when exposed to acid; found globally in ancient mountain belts.
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