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, and vitreous luster.
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Physical properties
Hardness of 7 on the Mohs scale, typically white to gray or pink, non-foliated texture, and vitreous luster.
Formation & geological history
Formed under high heat and pressure from quartz-rich sandstone, predominantly during regional or contact metamorphism.
Uses & applications
Used extensively in construction as crushed stone, railroad ballast, and dimension stone for countertops.
Geological facts
Quartzite is extremely durable and resistant to weathering, often forming prominent mountain ridges.
Field identification & locations
Identify by its hardness (scratches glass) and lack of reactivity to acid; found globally in mountainous and ancient cratonic regions.
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