metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically pink, white, or gray with a vitreous to greasy luster and non-foliated structure.
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Physical properties
Hardness of 7 on the Mohs scale, typically pink, white, or gray with a vitreous to greasy luster and non-foliated structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure, often occurring in mountain-building belts.
Uses & applications
Used extensively in construction, road aggregate, manufacturing of silica bricks, and occasionally as decorative stone.
Geological facts
Quartzite is extremely resistant to chemical weathering and erosion, which is why ridges formed of quartzite often form prominent mountain crests.
Field identification & locations
Identify in the field by its sugary texture on broken surfaces and inability to be scratched by a steel knife. Common globally in ancient cratons and mountain ranges.
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