metamorphic
Quartzite
Metamorphic Quartz Sandstone
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically pink, red, gray, or white with a vitreous to greasy luster and a non-foliated massive crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, typically pink, red, gray, or white with a vitreous to greasy luster and a non-foliated massive crystal structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure, often originating in ancient mountain-building events.
Uses & applications
Widely used as decorative landscaping stone, durable construction aggregate, dimension stone, and occasionally for high-grade silica production.
Geological facts
Quartzite is extremely durable and weather-resistant, often forming prominent mountain ridges because it weathers much slower than surrounding rocks.
Field identification & locations
Identified by its hard, interlocking quartz grains that do not fizz with hydrochloric acid and fracture across quartz grains rather than around them. Found globally.
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