metamorphic
Quartzite
Metamorphosed quartz sandstone (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, typically white, gray, or pinkish with a vitreous to greasy luster and interlocking crystalline structure.
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Physical properties
Hardness of 7 on Mohs scale, typically white, gray, or pinkish with a vitreous to greasy luster and interlocking crystalline structure.
Formation & geological history
Formed under intense heat and pressure from quartz-rich sandstone during regional or contact metamorphism.
Uses & applications
Used extensively in construction, road aggregates, decorative landscaping, and occasionally as a dimension stone.
Geological facts
Quartzite is extremely durable and weather-resistant, often forming prominent mountain ridges because it resists erosion better than surrounding rocks.
Field identification & locations
Identified by its hard, non-foliated texture and the inability of steel to scratch it; found globally in ancient orogenic belts.
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