metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, typically pink, white, or gray in color with a vitreous to greasy luster. Composed of interlocking quartz grains forming a non-foliated, dense crystal structure.
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Physical properties
Hardness of 7 on Mohs scale, typically pink, white, or gray in color with a vitreous to greasy luster. Composed of interlocking quartz grains forming a non-foliated, dense crystal structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure deep within the Earth's crust.
Uses & applications
Used extensively in construction, as crushed stone for roads, and occasionally in ornamental masonry and architecture.
Geological facts
Quartzite is extremely durable and resistant to weathering, often forming prominent mountain ridges. It does not fizz when exposed to hydrochloric acid, distinguishing it from marble.
Field identification & locations
Identify by its sugary texture on fractured surfaces and its inability to be scratched by a steel knife. Found worldwide in ancient mountain belts.
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