metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, white or gray color, vitreous to greasy luster, and non-foliated massive crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, white or gray color, vitreous to greasy luster, and non-foliated massive crystal structure.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure, typically occurring in mountain-building belts.
Uses & applications
Used in construction, railroad ballast, manufacturing of silica bricks, and occasionally as an ornamental stone or decorative aggregate.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often forming prominent ridges and peaks in mountain ranges.
Field identification & locations
Identified by its inability to be scratched by glass or steel and its sugary texture on broken surfaces; found globally.
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