metamorphic
Quartzite
Metamorphic Quartz Arenite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white to gray or greenish, vitreous luster, and non-foliated massive crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, typically white to gray or greenish, vitreous luster, and non-foliated massive crystal structure.
Formation & geological history
Formed under high heat and pressure from quartz-rich sandstone during regional or contact metamorphism.
Uses & applications
Used extensively in construction as crushed stone, railroad ballast, and decorative facing stone, as well as for manufacturing silica brick.
Geological facts
Quartzite is extremely durable and resistant to weathering, often forming prominent mountain ridges and erosion-resistant landforms.
Field identification & locations
Identified by its hardness which scratches glass and lack of reaction to hydrochloric acid; commonly found globally in ancient orogenic belts.
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