metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, predominantly white to gray with dark veining, vitreous luster, non-foliated crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, predominantly white to gray with dark veining, vitreous luster, non-foliated crystal structure.
Formation & geological history
Formed from quartz-rich sandstone or chert under intense heat and pressure during regional metamorphism.
Uses & applications
Used extensively in construction, as crushed stone for roads, and as a decorative dimension stone for countertops and architecture.
Geological facts
Quartzite is extremely durable and weather-resistant, often forming prominent mountain ridges because it resists erosion better than surrounding rocks.
Field identification & locations
Identified by its inability to be scratched by a steel knife and lack of effervescence when exposed to acid; commonly found in mountain belts worldwide.
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