metamorphic
Quartzite
Metamorphic Quartz
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white, gray, or reddish, with a vitreous to greasy luster.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, gray, or reddish, with a vitreous to greasy luster.
Formation & geological history
Formed from quartz sandstone subjected to high heat and pressure during tectonic compression.
Uses & applications
Used widely in construction, railroad ballast, and decorative aggregate or countertops.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identified by its hard, non-foliated texture that scratches glass and does not fizz with acid. Found globally in ancient mountain belts.
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