metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, tan to brown color, vitreous to greasy luster, non-foliated compact crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, tan to brown color, vitreous to greasy luster, non-foliated compact crystal structure.
Formation & geological history
Formed through the thermal metamorphism of quartz-rich sandstone under intense heat and pressure over millions of years.
Uses & applications
Used widely in construction, railroad ballast, manufacturing of silica bricks, and decorative landscaping or tumbling.
Geological facts
Quartzite is extremely durable and weather-resistant, often forming prominent mountain ridges because it resists erosion better than surrounding rocks.
Field identification & locations
Identify by its sugary texture on fractured surfaces and inability to be scratched by a steel knife. Found globally in ancient mountain belts.
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