metamorphic
Quartzite
Metamorphic Quartz Arenite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, colors ranging from white to gray and pinkish-brown, vitreous luster, non-foliated massive crystal structure, and specific gravity around 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, colors ranging from white to gray and pinkish-brown, vitreous luster, non-foliated massive crystal structure, and specific gravity around 2.65.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure, typically occurring in mountain-building belts over millions of years.
Uses & applications
Used extensively in construction, as crushed stone for road bases, in manufacturing refractory bricks, and occasionally as decorative dimension stone.
Geological facts
Quartzite is extremely durable and weather-resistant, often forming prominent ridges and peaks because it resists erosion better than surrounding rocks.
Field identification & locations
Identify in the field by its sugary texture on broken surfaces and the fact that it will scratch glass while failing to effervesce with hydrochloric acid.
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