metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white to gray or yellowish-brown, vitreous to greasy 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 yellowish-brown, vitreous to greasy luster, and non-foliated massive crystal structure.
Formation & geological history
Formed from quartz-rich sandstone subjected to intense heat and pressure during tectonic metamorphism over millions of years.
Uses & applications
Used extensively in construction, as crushed stone for roads, for dimension stone, and occasionally as a decorative aggregate or gemstone.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent mountain ridges.
Field identification & locations
Identify in the field by its inability to be scratched by steel and the fused quartz grains that break across rather than around the grains.
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