metamorphic
Quartzite
Metamorphic Quartz Sandstone
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white to gray in color, vitreous luster, and conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, typically white to gray in color, vitreous luster, and conchoidal fracture.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure over millions of years.
Uses & applications
Used widely in construction as crushed stone, dimension stone, and for manufacturing glass and refractory bricks.
Geological facts
Quartzite is extremely durable and weather-resistant, often forming prominent mountain ridges because it resists erosion.
Field identification & locations
Identified by its inability to be scratched by a knife and its tendency to fracture across quartz grains rather than around them.
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