metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white, gray, or pink with a vitreous to greasy luster and a non-foliated, interlocking crystalline structure.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, gray, or pink with a vitreous to greasy luster and a non-foliated, interlocking crystalline structure.
Formation & geological history
Formed from the metamorphism of quartz-rich sandstone under intense heat and pressure, often over hundreds of millions of years.
Uses & applications
Used extensively in construction as crushed stone for roads, as well as for decorative tiles, countertops, and manufacturing silicon.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, which is why mountain ridges made of quartzite often form prominent peaks.
Field identification & locations
Identified by its inability to be scratched by steel and its lack of fizzing with acid; commonly found in mountainous regions worldwide.
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