metamorphic
Quartzite
Metamorphic Quartzite
AI-generated identification · may be incorrectMohs hardness of 7; colors range from white and gray to pink; vitreous to greasy luster; massive crystal structure with interlocking quartz grains.
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Physical properties
Mohs hardness of 7; colors range from white and gray to pink; vitreous to greasy luster; massive crystal structure with interlocking quartz grains.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under extreme heat and tectonic pressure, typically over millions of years.
Uses & applications
Used in construction, as crushed stone for roads, and occasionally for decorative items or countertops.
Geological facts
Quartzite is extremely durable and weather-resistant, which is why ridges formed of it often stand out as high mountain crests.
Field identification & locations
Identify by its hardness (scratches glass easily) and lack of reactivity to acid; commonly found in mountain belts worldwide.
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