metamorphic
Quartzite
Metamorphic Quartzite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white, gray, or pinkish-brown with a vitreous to greasy luster, featuring a non-foliated interlocking quartz crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, gray, or pinkish-brown with a vitreous to greasy luster, featuring a non-foliated interlocking quartz crystal structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and tectonic pressure, often dating from the Precambrian to Cenozoic eras.
Uses & applications
Used widely in construction as crushed stone, dimension stone for architecture, and as decorative aggregate in landscaping.
Geological facts
Quartzite is extremely durable and resistant to weathering, often forming prominent mountain ridges where softer surrounding rocks have eroded away.
Field identification & locations
Identified in the field by its inability to be scratched by a steel knife and a lack of acid reaction, commonly found in mountainous or ancient craton regions.
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