metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically pinkish-brown or white, vitreous to greasy luster, massive crystal structure with conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, typically pinkish-brown or white, vitreous to greasy luster, massive crystal structure with conchoidal fracture.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure, often during mountain-building events.
Uses & applications
Used in construction, decorative landscaping, manufacturing of silica bricks, and occasionally as a gemstone.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, which is why ridges formed of quartzite often survive as prominent hills.
Field identification & locations
Identified by its hard, non-foliated texture and inability to be scratched by a steel knife; common in mountainous regions worldwide.
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