metamorphic
Quartzite
Metamorphic Quartzite
AI-generated identification · may be incorrectMohs hardness of 7, typically white, gray, or pinkish with a vitreous to greasy luster and non-foliated dense crystal structure.
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Physical properties
Mohs hardness of 7, typically white, gray, or pinkish with a vitreous to greasy luster and non-foliated dense crystal structure.
Formation & geological history
Formed from quartz-rich sandstone subjected to intense heat and pressure during tectonic metamorphism over millions of years.
Uses & applications
Used in construction, as crushed stone for roads, and occasionally for decorative countertops or landscaping stones.
Geological facts
Quartzite is extremely resistant to weathering and often forms prominent mountain ridges because it erodes much slower than surrounding rocks.
Field identification & locations
Identify in the field by its inability to be scratched by a knife and the way it breaks across quartz grains rather than around them; found worldwide.
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