metamorphic
Quartzite
Metamorphic Quartz Arenite
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, grayish-blue color, vitreous to greasy luster, non-foliated massive crystal structure.
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Physical properties
Hardness of 7 on Mohs scale, grayish-blue color, vitreous to greasy luster, non-foliated massive crystal structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure.
Uses & applications
Used widely in construction, dimension stone, road surfacing, and decorative landscaping.
Geological facts
Extremely resistant to weathering and chemical erosion, often forming prominent mountain ridges.
Field identification & locations
Identified by its inability to be scratched by a steel knife and lack of fizzing with acid; found worldwide.
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