metamorphic
Quartzite
Metamorphic quartz arenite
AI-generated identification · may be incorrectHardness 7 on the Mohs scale, vitreous luster, white to light gray color, and conchoidal fracture with no cleavage.
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Physical properties
Hardness 7 on the Mohs scale, vitreous luster, white to light gray color, and conchoidal fracture with no cleavage.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone subjected to high heat and tectonic pressure.
Uses & applications
Used extensively in construction, as crushed stone for roads, and occasionally for decorative interior surfaces.
Geological facts
Because quartz is extremely resistant to weathering, quartzite ridges often form prominent, durable mountain crests.
Field identification & locations
Identify in the field by its inability to be scratched by a steel knife and its tendency to break across rather than around quartz grains.
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