
metamorphic
Quartzite Pebble
Metamorphic Quartzite (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, pink to reddish color, non-foliated texture, vitreous luster, specific gravity of 2.65.
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Physical properties
Hardness of 7 on Mohs scale, pink to reddish color, non-foliated texture, vitreous luster, specific gravity of 2.65.
Formation & geological history
Formed from quartz-rich sandstone subjected to intense heat and pressure during regional metamorphism.
Uses & applications
Used in construction, aggregate, railway ballast, and decorative landscaping.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often outlasting the mountains it forms.
Field identification & locations
Identified by its inability to be scratched by steel and lack of fizzing with acid; common in riverbeds and glacial tills.
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