metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, typically brown, gray, or white with a vitreous to greasy luster and a non-foliated, granular crystal structure.
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Physical properties
Hardness of 7 on Mohs scale, typically brown, gray, or white with a vitreous to greasy luster and a non-foliated, granular crystal structure.
Formation & geological history
Formed under intense heat and pressure from quartz-rich sandstone over millions of years.
Uses & applications
Used extensively in construction, as crushed stone for roads, and occasionally for decorative landscaping or countertops.
Geological facts
Quartzite is extremely resistant to chemical weathering and erosion, often forming prominent mountain ridges.
Field identification & locations
Can be identified in the field by its inability to be scratched by a knife and its characteristic sugary texture on broken surfaces; found worldwide.
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