metamorphic
Quartzite
Metamorphic Quartz Arenite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white to gray or pink, non-foliated texture, vitreous luster, and conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, typically white to gray or pink, non-foliated texture, vitreous luster, and conchoidal fracture.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure, commonly originating in mountain-building belts.
Uses & applications
Used extensively in construction, as crushed stone for roadbeds, in manufacturing refractory bricks, and occasionally as a decorative dimension stone.
Geological facts
Quartzite is extremely resistant to chemical weathering and erosion, which is why ridges formed of quartzite often persist as high mountain crests.
Field identification & locations
Identify by its hardness (scratches glass) and sugar-like crystalline surface texture. Found globally in ancient orogenic zones.
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