metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, vitreous luster, white to grey color with reddish iron oxide stains, non-foliated massive crystal structure.
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Physical properties
Hardness of 7 on Mohs scale, vitreous luster, white to grey color with reddish iron oxide stains, non-foliated massive crystal structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure, typically during mountain-building events.
Uses & applications
Used widely in construction, railroad ballast, dimension stone, and manufactured countertops due to extreme durability.
Geological facts
Extremely resistant to weathering, quartzite ridges often form prominent mountain crests and resistant landforms.
Field identification & locations
Identified by its inability to be scratched by steel and lack of acid reaction; commonly found in ancient mountain belts worldwide.
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